Sources
Every lesson is written from a corpus of checked sources. This is the whole list, not a sample.
162 sources, 152 of them verified. 102 carry a recorded licence. 74 can show you what was taken from them.
Law 14 sources
- Cornell LII — Legal Information Institutereferencelicence not recordedfull text not retrievable
- EUR-Lex — EU Official Legal Databasestandardlicence not recordedfull text not retrievable
- HUDOC — European Court of Human Rightsreferencelicence not recordedfull text not retrievable
- International Court of Justice — ICJreferencelicence not recordedfull text not retrievable
- Max Planck Encyclopedia of Comparative Public Lawreferencelicence not recordedfull text not retrievable
- OHCHR Human Rights Treaty Bodiesreferencelicence not recordedfull text not retrievable
- OpenStax Business Law I Essentialstextbookfull text not retrievableCC-BY-NC-SA-4.0
- SEC — Rules and RegulationsreferenceUS-Government-Public-Domain
What was read from this (1 of 30 passages) it significant public input and undergo rigorous analysis before any regulatory change takes effect. A need for rulemaking can be identified internally by the Commission or its staff, or externally by Congress, regulatory organizations, or the public. Under the Regulatory Flexibility Act, the SEC is required to publish……
- UN Treaty Collectionreferencelicence not recordedfull text not retrievable
- United States Courts — Educational ResourcesreferenceUS-Government-Public-Domain
What was read from this (1 of 36 passages) cases over which they have jurisdiction granted by the Constitution or Congress. Types of Cases U.S. Courts hear cases over which they have jurisdiction granted by the Constitution or Congress. Back Types of Cases Appeals Bankruptcy Cases Civil Cases Criminal Cases About Federal Judges Federal judges work to ensure equ……
- United States Courts — Rules and PoliciesreferenceUS-Government-Public-Domain
What was read from this (1 of 36 passages) cases over which they have jurisdiction granted by the Constitution or Congress. Types of Cases U.S. Courts hear cases over which they have jurisdiction granted by the Constitution or Congress. Back Types of Cases Appeals Bankruptcy Cases Civil Cases Criminal Cases About Federal Judges Federal judges work to ensure equ……
- US Code (official, public domain)standardUS-Government-Public-Domain
What was read from this (1 of 4 passages) The First Amendment to the United States Constitution, ratified December 15, 1791, as part of the Bill of Rights, provides: 'Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peace……
at the source ↗ - US Department of Justice — Office of Legal Counsel OpinionsreferenceUS-Government-Public-Domain
What was read from this (1 of 63 passages) w A-Z List View by Category View Org Chart Signed PDF (Pinch and expand to zoom in and out) Office of the Attorney General This Office supervises and directs the administration and operation of the Department of Justice, including the Federal Bureau of Investigation, Drug Enforcement Administration, Bureau of Alcohol, ……
at the source ↗ - Yale Avalon Project — International Law Documentsreferencelicence not recordedfull text not retrievable
Health 11 sources
- CDC Scientific PublicationsreferenceUS-Government-Public-Domain
What was read from this (1 of 6 passages) Heart disease is the leading cause of death for men, women, and people of most racial and ethnic groups in the United States. About 695,000 people in the United States died from heart disease in 2021—that is 1 in every 5 deaths. Heart disease costs the United States about $239.9 billion each year (2018–2019), including……
at the source ↗ - MedlinePlus — Health Topics (NIH)referenceUS-Government-Public-Domain
What was read from this (1 of 34 passages) Temas de salud: MedlinePlus en español Omita y vaya al Contenido Un sitio oficial del Gobierno de Estados Unidos Así es como usted puede verificarlo Así es como usted puede verificarlo Los sitios web oficiales usan .gov Un sitio web .gov pertenece a una organización oficial del Gobierno de Estados Unidos. Los sitios we……
at the source ↗ - National Cancer Institute — About Cancer (NIH)referenceUS-Government-Public-Domain
What was read from this (1 of 111 passages) alth care information, bills, and other records, along with tips for saving money on pain medicines. Support for Families When a Child Has Cancer Advice to help families cope after a child has been diagnosed with cancer. Advanced Cancer Information to help with talking about and coping with advanced cancer, making choi……
- New England Journal of Medicinepeer_reviewedlicence not recordedfull text not retrievable
- NHLBI — Heart, Lung and Blood Health Topics (NIH)referenceUS-Government-Public-Domain
What was read from this (1 of 32 passages) tion to help you learn more about heart, lung, blood, and sleep conditions, diagnostic tests, and treatments. Search Health Topics A-Z Search a condition, treatment, or topic. Search Filter Health Topics by starting letter ALL A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Displaying 8 out of 104 results A Conditi……
- NIDDK — Health Information (NIH)referenceUS-Government-Public-Domain
What was read from this (1 of 131 passages) athy is very common. About one-third to one-half of people with diabetes have peripheral neuropathy. Autonomic Neuropathy Autonomic neuropathy is damage to nerves that control your internal organs, leading to problems with your heart rate and blood pressure, digestive system, bladder, sex organs, sweat glands, and eyes……
at the source ↗ - NIH National Library of Medicinereferencelicence not recordedfull text not retrievable
- OpenStax Anatomy and Physiology 2etextbookfull text not retrievableCC-BY-NC-SA-4.0
- PubMed Central Open Access (CC BY subset)peer_reviewedlicence not recordedfull text not retrievable
- The Lancet (Elsevier)peer_reviewedlicence not recordedfull text not retrievable
- WHO Open Access Publications (CC BY-NC-SA)referencelicence not recordedfull text not retrievable
History 10 sources
- British Library Digitised Collectionsreferencelicence not recordedfull text not retrievable
- Gallica — Bibliothèque nationale de Francereferencelicence not recordedfull text not retrievable
- Library of Congress — ExhibitionsreferenceUS-Government-Public-Domain
What was read from this (1 of 91 passages) 3, 2027 The Declaration’s principles became the shared vision of a new democratic way of government. Its ideals of equality, liberty, and the pursuit of happiness place human dignity and the rights of the individual at the forefront of our national consciousness. In its language, Americans have heard a call to rally fo……
- Library of Congress Digital Collectionsreferencelicence not recordedfull text not retrievable
- National Archives — Milestone DocumentsreferenceUS-Government-Public-Domain
- National Park Service — Heritage DocumentationreferenceUS-Government-Public-Domain
What was read from this (1 of 15 passages) States through the creation of measured drawings, large-format photographs, and historical reports. Documentation is archived in the HABS/HAER/HALS Collection at the Library of Congress and is available to the public without restriction. HDP is part of the National Park Service’s Cultural Resources, Partnerships, and S……
- Perseus Digital Library — Tufts Universityreferencelicence not recordedfull text not retrievable
- UNESCO World Digital Libraryreferencelicence not recordedfull text not retrievable
- US National Archives — Founders OnlinereferenceUS-Government-Public-Domain
What was read from this (1 of 4 passages) Founders Online, a project of the National Archives and Records Administration (NARA), provides free public access to the papers of six Founding Fathers: George Washington, Benjamin Franklin, Alexander Hamilton, John Adams, Thomas Jefferson, and James Madison—totaling over 178,000 documents. The Federalist Papers, writ……
at the source ↗ - Yale Avalon Project — Primary Historical Documentsreferencelicence not recordedfull text not retrievable
Literature 10 sources
- Bodleian Libraries Digital Collections — Oxfordreferencelicence not recordedfull text not retrievable
- British Library Discovering Literaturereferencelicence not recordedfull text not retrievable
- Gallica — Bibliothèque nationale de Francereferencelicence not recordedfull text not retrievable
- Library of Congress — Poetry and Literature CenterreferenceUS-Government-Public-Domain
What was read from this (1 of 3 passages) About This Program | Poetry & Literature | Programs | Library of Congress Top of page Skip to main content Library of Congress Search Everything Audio Recordings Books/Printed Material Films, Videos Legislation Manuscripts/Mixed Material Maps Notated Music Newspapers Periodicals Personal Narratives Photos, Prints, Draw……
- Library of Congress Literary Collectionsreferencelicence not recordedfull text not retrievable
- Perseus Digital Library — Tufts Universityreferencelicence not recordedfull text not retrievable
- Project Gutenberg — Bookshelves (public domain)referenceUS-Public-Domain
What was read from this (1 of 12 passages) tribution. Emmy died in February 2017 and is deeply missed by everybody at Distributed Proofreaders. In her work at Distributed Proofreaders, she was directly responsible for adding more than 1,000 e-books, many in the realm of Children’s Literature, to Project Gutenberg. Emmy loved her work and was loved and respected……
at the source ↗ - Project Gutenberg — Fiction BookshelfreferenceUS-Public-Domain
What was read from this (1 of 16 passages) Offline Catalogs | Project Gutenberg X Go! Donate About ▼ About Project Gutenberg Reading Options & Kindle Contact Us History & Philosophy Help Pages Offline Catalogs Donate Frequently Downloaded Main Categories Reading Lists Search Options Frequently Downloaded Main Categories Offline Catalogs and Feeds This page tell……
at the source ↗ - Samevian Canonical Seed (Literature)textbookfull text not retrievableCC-BY-4.0
What was read from this (1 of 4 passages) Literature encompasses written works with artistic or intellectual value: poetry, prose fiction, drama, essay. Western literary history begins with ancient Greek texts—Homer's Iliad and Odyssey, the tragedies of Aeschylus, Sophocles (Oedipus Rex, Antigone), Euripides, and Aristophanes. The Epic of Gilgamesh (c. 2100 BC……
at the source ↗ - Standard Ebooks — Public Domain LibraryreferenceUS-Public-Domain
What was read from this (1 of 53 passages) inrich Kramer The Fall of Robespierre Samuel Taylor Coleridge Robert Southey The Wheels of Chance H. G. Wells The Mummy! Jane C. Loudon The Place Called Dagon Herbert Gorman Hand and Ring Anna Katharine Green The Lost Stradivarius John Meade Falkner Racundra’s First Cruise Arthur Ransome The Man from the Clouds J. Stor……
Religion 10 sources
- British Library Sacred and Religious Textsreferencelicence not recordedfull text not retrievable
- Harvard Divinity School Libraryreferencelicence not recordedfull text not retrievable
- Library of Congress — Religion Research GuidesreferenceUS-Government-Public-Domain
What was read from this (1 of 12 passages) g websites and how the Library will work with a researcher after a vulnerability has been validated. About Copyright and the Collections As a publicly supported institution, we generally do not own the rights to materials in our collections. You should determine for yourself whether or not an item is protected by copyr……
at the source ↗ - Library of Congress Religion Collectionsreferencelicence not recordedfull text not retrievable
- Oxford Islamic Studies Onlinereferencelicence not recordedfull text not retrievable
- Oxford Oriental Institute — Digital Libraryreferencelicence not recordedfull text not retrievable
- Project Gutenberg — Religion BookshelfreferenceUS-Public-Domain
What was read from this (1 of 39 passages) Offline Catalogs | Project Gutenberg X Go! Donate About ▼ About Project Gutenberg Reading Options & Kindle Contact Us History & Philosophy Help Pages Offline Catalogs Donate Frequently Downloaded Main Categories Reading Lists Search Options Frequently Downloaded Main Categories Offline Catalogs and Feeds This page tell……
at the source ↗ - Samevian Canonical Seed (Religion)textbookfull text not retrievableCC-BY-4.0
What was read from this (1 of 4 passages) Islam is a monotheistic Abrahamic religion founded in 7th-century Arabia on Quranic revelations to the Prophet Muhammad (c. 570–632 CE). The Five Pillars: Shahada, Salat (5 daily prayers toward Mecca), Zakat (2.5% annual alms), Sawm (Ramadan fasting), Hajj (pilgrimage to Mecca). Sunni/Shia split arose over caliphate su……
at the source ↗ - SOAS University of London — Sacred Texts Collectionreferencelicence not recordedfull text not retrievable
- Vatican Apostolic Library — DigiVatLibreferencelicence not recordedfull text not retrievable
Economics 9 sources
- Bureau of Economic Analysis — Glossary and ArticlesreferenceUS-Government-Public-Domain
What was read from this (1 of 36 passages) dvance estimate The first estimate of gross domestic product (GDP) and its components for a quarter. It is released 25-30 days after the end of the quarter and is based on source data that are incomplete and subject to revision. Related terms Final estimate Annual input-output (I-O) accounts Set of I-O tables— make tab……
- Federal Reserve — Consumers and CommunitiesreferenceUS-Government-Public-Domain
What was read from this (1 of 49 passages) fer to the maintenance periods for which the vault cash can be used to satisfy reserve requirements. All vault cash held during the lagged computation period by "bound" institutions (that is, those whose required reserves exceed their vault cash) plus the amount of vault cash applied during the maintenance period by "n……
at the source ↗ - Federal Reserve Research PublicationsreferenceUS-Government-Public-Domain
What was read from this (1 of 52 passages) st exposed to tariff increases? A new measure based on the consumption channel Nick Heyman, Colin J. Hottman , and Ryan Monarch September 2026 Why Gold Didnt Actually Overtake Treasury Securities as the Worlds "Favorite" Reserve Asset Colin Weiss View All Data, Models and Tools FRB/US Model : A large-scale es……
- IMF Open Access Publications (CC BY 4.0)referencefull text not retrievableCC-BY-4.0
- NBER Working Paperspeer_reviewedlicence not recordedfull text not retrievable
- Nobel Economic Sciences Lectures (Nobelprize.org)peer_reviewedlicence not recordedfull text not retrievable
- OECD Open Access Publications (CC BY 4.0)referenceCC-BY-4.0
What was read from this (1 of 6 passages) The OECD Economic Outlook provides twice-yearly assessments of major economic trends and prospects for OECD countries and selected non-member economies. According to OECD projections, global GDP growth was 3.1% in 2023, with advanced economies growing at 1.5% and emerging market economies at 4.3%. Global trade growth s……
at the source ↗ - US Bureau of Labor Statistics — PublicationsreferenceUS-Government-Public-Domain
What was read from this (1 of 24 passages) o subscribe to the BLS Online Calendar. See details below for users of different types of calendars. Instructions for Outlook and Apple iCal Users: Simply click on the link (Note: Link may seem to be broken if you do not have Outlook or Apple iCal installed.) If the link doesn't work for you, try downloading the file a……
at the source ↗ - World Bank Open Research (CC BY 4.0)referenceCC-BY-4.0
What was read from this (1 of 4 passages) Global extreme poverty—defined as living on less than $2.15 per day (2017 PPP)—has declined dramatically over the past three decades. The World Bank estimates that the global extreme poverty rate fell from 36% in 1990 to approximately 9% in 2019, lifting more than 1.2 billion people out of extreme poverty. Progress was……
at the source ↗
Geography 9 sources
- CIA World FactbookreferenceUS-Government-Public-Domain
What was read from this (1 of 4 passages) The world's total land area is approximately 148.9 million square kilometers (57.5 million square miles), covering about 29.2% of Earth's surface. The remaining 70.8% is water. The largest country by area is Russia at 17.1 million sq km, followed by Canada (10.0 million), the United States (9.8 million), China (9.6 mil……
at the source ↗ - NASA Earthdata — LearnreferenceUS-Government-Public-Domain
What was read from this (1 of 59 passages) real-time Capability for Earth observation (LANCE) Harmonized Landsat and Sentinel-2 (HLS) Applied Remote Sensing Training Program (ARSET) Ask the Earthdata Forum Observation Methods Platforms NASA operates state-of-the-art platforms that collect critical information about our home planet. Drill down to the data and to……
- NOAA Geophysical and Climate DatareferenceUS-Government-Public-Domain
What was read from this (1 of 4 passages) Bathymetry is the measurement and mapping of the seafloor's topography. NOAA's National Centers for Environmental Information maintains ETOPO, a global relief model of Earth's surface integrating land topography and ocean bathymetry at 15-arc-second resolution. Less than 25% of the ocean floor has been mapped to modern……
- UN Statistics Division Open Datareferencelicence not recordedfull text not retrievable
- US BLS Occupational Outlook Handbook — Cartographers and PhotogrammetristsreferenceUS-Government-Public-Domain
What was read from this (1 of 69 passages) artographers and Photogrammetrists Do Cartographers and photogrammetrists collect, analyze, and interpret geographic information to create and update maps and related products. Work Environment Although cartographers and photogrammetrists spend much of their time in an office setting, some jobs require travel to locati……
- US BLS Occupational Outlook Handbook — GeographersreferenceUS-Government-Public-Domain
What was read from this (1 of 101 passages) stribution of its land, features, and inhabitants. Work Environment Most geographers work full time. Geographers who do fieldwork may travel to foreign countries or remote locations. How to Become a Geographer Geographers typically need at least a bachelor’s degree to enter the occupation. Some jobs require a mas……
- USGS — Water Resources Mission AreareferenceUS-Government-Public-Domain
What was read from this (1 of 113 passages) yees Office of Civil Rights Doing Business Emergency Management Latest Earthquakes Share Social Media Facebook Twitter Linkedin Digg Reddit Pinterest Email Breadcrumb News Breadcrumb News As above, so below? Trends in groundwater and streamflow across the United States 1980-2020 By Water Resources Mission Area August 1……
at the source ↗ - USGS Scientific Investigations ReportsreferenceUS-Government-Public-Domain
What was read from this (1 of 88 passages) its science. ASK USGS contact form Contact the subject matter experts at the U.S. Geological Survey. USGS Library website Authorized by Congress in 1879, the U.S Geological Survey Library is recognized as one of the world’s largest Earth and natural science libraries, providing services, collections, and expertise that……
at the source ↗ - World Bank Open DatareferenceCC-BY-4.0
What was read from this (1 of 20 passages) World Bank Open Data | Data It seems you are using an older browser. This site is optimized for modern browsers. Please upgrade to a modern browser for the best experience. Data HOME ECONOMIES THEMES DATA & RESOURCES ABOUT English Español Français العربية 中文 World Bank Open Data Free and open access to global developme……
Languages 9 sources
- Foreign Service Institute — Language Courses (US Gov public domain)textbookUS-Government-Public-Domain
- Glottolog — Language Family Catalogue (CC BY 4.0)referenceCC-BY-4.0
What was read from this (1 of 10 passages) ialectology socling minimal comparative wordlist new_testament text phonology specific_feature dictionary grammar_sketch grammar --any-- anla asjp2010 bahasa benjamins bibliolux bowern cldf degruyter eballiso2009 elpub evobib fabreall2009ann gilbertese gj glossa goba guldemann haspelmath hedvig-tirailleur hh iso6393 jo……
at the source ↗ - Language Science Press — Open Access Linguistics Bookspeer_reviewedCC-BY-4.0
What was read from this (1 of 78 passages) erican English as a discursive variety : Tracing enregisterment processes in nineteenth-century U.S. newspapers Ingrid Paulsen March 15, 2022 12 The expression of information structure in Bantu Jenneke van der Wal (ed) March 28, 2025 7 The role of cross-linguistic influence, internal dynamics, and register in heritage ……
- Languages — MDPI Open Access Journal (ISSN 2226-471X)peer_reviewedfull text not retrievableCC-BY-4.0
- Linguistic Society of Americareferencelicence not recordedfull text not retrievable
- Max Planck Institute for Psycholinguistics Archivepeer_reviewedlicence not recordedfull text not retrievable
- Samevian Canonical Seed (Languages)textbookfull text not retrievableCC-BY-4.0
What was read from this (1 of 4 passages) Human language is a system of communication using structured sound, sign, or writing sequences governed by grammar. Approximately 7,168 living languages exist (Ethnologue, 27th ed., 2024); 43% are endangered. Language families: Indo-European (3 billion speakers), Sino-Tibetan, Afro-Asiatic, Niger-Congo, Austronesian, D……
at the source ↗ - SIL International — Ethnologuereferencelicence not recordedfull text not retrievable
- WALS Online — World Atlas of Language Structuresreferencelicence not recordedfull text not retrievable
Philosophy 9 sources
- MIT Internet Classics Archive (public domain)referencelicence not recordedfull text not retrievable
- OpenStax Introduction to Philosophytextbookfull text not retrievableCC-BY-NC-SA-4.0
- Perseus Digital Library — Tufts Universityreferencelicence not recordedfull text not retrievable
- PhilArchive Open Access (CC BY preprints)peer_reviewedlicence not recordedfull text not retrievable
- Project Gutenberg — Ethics BookshelfreferenceUS-Public-Domain
What was read from this (1 of 15 passages) Offline Catalogs | Project Gutenberg X Go! Donate About ▼ About Project Gutenberg Reading Options & Kindle Contact Us History & Philosophy Help Pages Offline Catalogs Donate Frequently Downloaded Main Categories Reading Lists Search Options Frequently Downloaded Main Categories Offline Catalogs and Feeds This page tell……
at the source ↗ - Project Gutenberg — Logic BookshelfreferenceUS-Public-Domain
What was read from this (1 of 14 passages) d among the Man-tze of the Somo territory Isabella L. Bird Feb 4, 2026 The Russian road to China Jr. Lindon Bates Oct 19, 2025 A year in China : and a narrative of capture and imprisonment, when homeward bound, on board the rebel pirate Florida Martha Noyes Williams Jul 10, 2025 De Paris à Pékin par terre: Sibérie-Mong……
at the source ↗ - Project Gutenberg — Philosophy Bookshelf (public domain)referenceUS-Public-Domain
What was read from this (1 of 39 passages) Offline Catalogs | Project Gutenberg X Go! Donate About ▼ About Project Gutenberg Reading Options & Kindle Contact Us History & Philosophy Help Pages Offline Catalogs Donate Frequently Downloaded Main Categories Reading Lists Search Options Frequently Downloaded Main Categories Offline Catalogs and Feeds This page tell……
at the source ↗ - Samevian Canonical Seed (Philosophy)textbookfull text not retrievableCC-BY-4.0
What was read from this (1 of 4 passages) Philosophy (Greek: φιλοσοφία, love of wisdom) is the systematic inquiry into fundamental questions about existence, knowledge, values, reason, mind, and language. Major branches: Metaphysics, Epistemology, Ethics, Logic, Aesthetics, Political Philosophy. Ancient Greek philosophy—Socrates (Socratic method), Plato (Theor……
at the source ↗ - Stanford Encyclopedia of Philosophyreferencelicence not recordedfull text not retrievable
Psychology 9 sources
- Annual Review of Psychologypeer_reviewedlicence not recordedfull text not retrievable
- APA Open Access Archivepeer_reviewedlicence not recordedfull text not retrievable
- CDC — Mental HealthreferenceUS-Government-Public-Domain
What was read from this (1 of 52 passages) ress Mental Health Data Channel Mental Health Stigma View Menu About Mental Health For Everyone Aug. 20, 2026 Español Get help now If you or someone you know is struggling or in crisis, confidential, free, 24/7/365 help is available. Call or text 988 or chat 988lifeline.org. See Resources for help . Key points Mental h……
- NIDA — Research Topics (NIH)referenceUS-Government-Public-Domain
What was read from this (1 of 42 passages) n Drug Abuse (NIDA) is the largest supporter of the world’s research on substance use and addiction. Part of the National Institutes of Health, NIDA conducts and supports biomedical research to advance the science on substance use and addiction and improve individual and public health. Look below for more information o……
- NIH NIMH Research Publicationsreferencelicence not recordedfull text not retrievable
- NIMH — National Institute of Mental Health, Health TopicsreferenceUS-Government-Public-Domain
What was read from this (1 of 160 passages) ansition, you may notice changes to navigation, page layouts, and where some information is located. Learn more and get the latest updates in our Frequently Asked Questions . In Crisis? Call or Text 988 Transforming the understanding and treatment of mental illnesses. Home | Help for Mental Illnesses --> Search the NIM……
- OpenStax Psychology 2etextbookfull text not retrievableCC-BY-NC-SA-4.0
- PubMed Central Psychology OA (CC BY)peer_reviewedlicence not recordedfull text not retrievable
- Samevian Canonical Seed (Psychology)textbookfull text not retrievableCC-BY-4.0
What was read from this (1 of 4 passages) Psychology is the scientific study of mind and behavior: perception, cognition, emotion, personality, motivation, social interaction, and psychopathology. Major theoretical schools: Psychoanalysis (Freud—unconscious drives, ego/id/superego, defense mechanisms); Behaviorism (Watson, Skinner—classical conditioning, opera……
at the source ↗
Arts 8 sources
- Arts — MDPI Open Access Journal (ISSN 2076-0752)peer_reviewedfull text not retrievableCC-BY-4.0
- Europeana Collections (CC BY / CC0)referencelicence not recordedfull text not retrievable
- Getty Open Content Program (CC0)referenceCC0-1.0
What was read from this (1 of 4 passages) The J. Paul Getty Museum in Los Angeles holds one of the world's preeminent collections of European paintings, drawings, illuminated manuscripts, sculpture, and decorative arts, as well as significant holdings of Greek, Roman, and Etruscan antiquities, and one of the premier photography collections. The Getty Open Cont……
- Library of Congress — Prints and PhotographsreferenceUS-Government-Public-Domain
What was read from this (1 of 25 passages) hl, Edward Abbuehl, Edward H. (2) ABCs Abd al-Ghaff r, al-Sayyid, Physician of Mecca Abdalian, L. H. (Leon H.) Abdel-Raheem, Tarek (2) Abdollahzadeh, Yashar Abdulaziz, Mustafah Abdülhamid II, Sultan of the Turks, 1842-1918 (52) Abdulhamid, Ismat Ayman Abdullah Fréres (1279) Abdullah, Hend Abel & Company Abel & Durang. ……
at the source ↗ - Metropolitan Museum of Art Open Access (CC0)referenceCC0-1.0
What was read from this (1 of 4 passages) The Metropolitan Museum of Art in New York City holds one of the world's largest and most comprehensive art collections, spanning 5,000 years of history across every region of the globe. Founded in 1870, the Met's permanent collection comprises over 1.5 million works of art, of which approximately 490,000 objects are a……
at the source ↗ - MoMA Online Collection (CC0)referenceCC0-1.0
What was read from this (1 of 4 passages) MoMA's photography collection, established in 1940 as the first curatorial department of photography at any major art museum, holds over 25,000 works tracing the medium's history from its 1839 origins to contemporary practice. The department's founding under Beaumont Newhall established photography as a fine art form w……
at the source ↗ - National Endowment for the Arts — Research PublicationsreferenceUS-Government-Public-Domain
What was read from this (1 of 20 passages) dership and Staff What Is the NEA Publications National Endowment for the Arts on COVID-19 Open Government Freedom of Information Act (FOIA) Office of the Inspector General Civil Rights Office Appropriations History Make a Donation Home Impact Research Research Publications Get Hard Copies of selected publications by c……
- Smithsonian Open Access (CC0)referenceCC0-1.0
What was read from this (1 of 4 passages) The Smithsonian Institution, established by an Act of Congress in 1846 using a bequest from British scientist James Smithson, is the world's largest museum and research complex, comprising 19 museums, 21 libraries, 9 research centers, and a zoo. The institution's collections total approximately 155 million objects, spe……
Mathematics 8 sources
- arXiv Mathematics (CC BY preprints)peer_reviewedCC-BY-4.0-per-paper
What was read from this (1 of 141 passages) GHz instrument targeting the frequency space where sensitivity to the CMB polarization is maximized. The receiver will be deployed in the 2026-2027 austral summer, and is set to position BA to achieve exceptionally precise measurements of cosmic microwave background (CMB) polarization and strengthen constraints on infl……
at the source ↗ - Mathematics — MDPI Open Access Journal (ISSN 2227-7390)peer_reviewedfull text not retrievableCC-BY-4.0
- MIT OpenCourseWare Mathematicsreferencelicence not recordedfull text not retrievable
- NASA Glenn — Beginner's Guide (applied mathematics)referenceUS-Government-Public-Domain
What was read from this (1 of 14 passages) Animated Relative Velocities + Text Only Site + Non-Flash Version + Contact Glenn Here's a page for you to explore the relative velocity between an aircraft in flight, the ground, and the air through which the airplane moves. In this animation, the white clouds move relative to the ground at the wind speed, the airplan……
at the source ↗ - NIST Digital Library of Mathematical FunctionsreferenceUS-Government-Public-Domain
What was read from this (1 of 40 passages) ng cycle number of the first kind; (26.13.3) ⟨ f , g ⟩ inner product over functions; (1.18.12) ⟨ 𝐮 , 𝐯 ⟩ inner product over vectors; (1.2.40) ‖ 𝐯 ‖ vector norm ( l ²); (1.2.46) … sequence, asymptotic sequence (or scale), or enumerable set; §2.1(v) z , ζ Schwarzian derivative; (1.13.20) n k = S ( n , k ) notation used……
at the source ↗ - NIST Digital Library of Mathematical Functionsreferencelicence not recordedfull text not retrievable
- OpenStax Calculus Volume 1textbookfull text not retrievableCC-BY-NC-SA-4.0
- OpenStax Introductory Statisticstextbookfull text not retrievableCC-BY-NC-SA-4.0
Occupations 8 sources
- Canada National Occupational Classification 2021 + OaSISreferencenot yet verifiedfull text not retrievableOGL-Canada-2.0
- ESCO — European Skills, Competences, Qualifications and Occupationsreferencenot yet verifiedfull text not retrievableEU-Decision-2011-833-EU
- O*NET 30.3 Database (USDOL/ETA)referencenot yet verifiedfull text not retrievableCC-BY-4.0
- O*NET OnLine — occupation pagesreferencenot yet verifiedfull text not retrievableCC-BY-4.0
- UK National Careers Service — job profilesreferencenot yet verifiedfull text not retrievableOGL-v3
- US BLS Employment Projectionsreferencenot yet verifiedfull text not retrievableUS-Government-Public-Domain
- US BLS Occupational Employment and Wage Statistics (OEWS)referencenot yet verifiedfull text not retrievableUS-Government-Public-Domain
- US BLS Occupational Outlook Handbook — full handbookreferencenot yet verifiedfull text not retrievableUS-Government-Public-Domain
Environment 7 sources
- EPA Environmental ResearchreferenceUS-Government-Public-Domain
What was read from this (1 of 9 passages) Research Centers Planning, Budget, and Results Organization Chart EPA History EPAs Report on the Environment (ROE) What is an ROE Indicator? EPA's Report on the Environment (ROE) indicators are simple measures that track the state of the environment and human health over time. Learn about ROE indicators Explore ROE Ind……
- IPCC Assessment Reportsreferencelicence not recordedfull text not retrievable
- NASA Climate Change Open DatareferenceUS-Government-Public-Domain
What was read from this (1 of 4 passages) According to NASA's GISS Surface Temperature Analysis (GISTEMP v4), the global average surface temperature in 2023 was 1.17°C (2.10°F) above the 1951–1980 baseline average—the warmest year in the 144-year instrumental record. The 10 warmest years on record have all occurred since 2010. The long-term warming trend is ap……
at the source ↗ - NOAA Climate Research PublicationsreferenceUS-Government-Public-Domain
What was read from this (1 of 4 passages) NOAA data show the global average ocean surface temperature in 2023 was 0.91°C (1.64°F) above the 20th-century average—the highest on record. Ocean heat content in the upper 2000 meters reached record-high levels in 2023, with the Atlantic, Pacific, Indian, and Southern Oceans all setting new records. The ocean has abs……
- NOAA Climate.gov — Teaching ClimatereferenceUS-Government-Public-Domain
What was read from this (1 of 30 passages) ome Climate Dashboard Teaching Climate Teaching Energy Toolbox for Climate & Energy Partnership with CLEAN collection View Teaching Climate section Resilience Toolkit About About Us Whats New FAQs Sitemap Facebook BlueSky Twitter Instagram YouTube This website is an ARCHIVED version of NOAA Climate.gov as of June 25, 2……
- UN Environment Programme Open Publicationsreferencelicence not recordedfull text not retrievable
- USGS — Water Science SchoolreferenceUS-Government-Public-Domain
What was read from this (1 of 42 passages) AQ Connect Water Science School Welcome to the U.S. Geological Survey's (USGS) Water Science School. We offer information on many aspects of water, along with pictures, data, maps, and an interactive center where you can give opinions and test your water knowledge. Escuela de Ciencias del Agua New! Water Cycle Diagram ……
Sports 7 sources
- ACSM — American College of Sports Medicinepeer_reviewedlicence not recordedfull text not retrievable
- CDC Physical Activity GuidelinesreferenceUS-Government-Public-Domain
What was read from this (1 of 49 passages) c. 3, 2025 Key points Physical activity can make you feel better, function better, and sleep better. The amount of physical activity you need depends mostly on your age. There are many ways to add physical activity to your life. Benefits Physical activity has many immediate and long-term benefits. Read about benefits o……
- Health.gov — Nutrition and Physical ActivityreferenceUS-Government-Public-Domain
What was read from this (1 of 48 passages) utrition & Physical Activity At ODPHP, we’re committed to empowering people to improve their health. And we’re charged by Congress to coordinate disease prevention activities within HHS and to support research that promotes health. In line with this charge, we set guidelines for nutrition and physical activity that inf……
- IOC Olympic Studies Centrereferencelicence not recordedfull text not retrievable
- NIAMS — Musculoskeletal and Sports Health Topics (NIH)referenceUS-Government-Public-Domain
What was read from this (1 of 35 passages) ons related to arthritis, musculoskeletal, and skin diseases Health Topics A–Z This information is not intended to answer specific questions about a particular problem or condition. It should not be used to diagnose or treat conditions. A B C E F G H I J K M O P R S V W Health Topics by Category Arthritis and Rheumatic……
- NIH NCBI Sports Medicine Open Accesspeer_reviewedlicence not recordedfull text not retrievable
- Sports — MDPI Open Access Journal (ISSN 2075-4663)peer_reviewedfull text not retrievableCC-BY-4.0
Technology 6 sources
- CISA — Cybersecurity Best PracticesreferenceUS-Government-Public-Domain
What was read from this (1 of 126 passages) ts no-cost Cyber Services Cybersecurity Awareness Month KEV Catalog Report A Cyber Issue Breadcrumb Home Topics Cybersecurity Best Practices Share: Opens in a new window Opens in a new window Opens in a new window Cybersecurity Best Practices CISA provides information on cybersecurity best practices to help individuals……
- NIST — Information Technology LaboratoryreferenceUS-Government-Public-Domain
What was read from this (1 of 54 passages) enesis Mission to Accelerate AI Innovation WELCOME TO THE INFORMATION TECHNOLOGY LABORATORY The Information Technology Laboratory (ITL) is one of NIST’s six research laboratories. ITL’s mission is to cultivate trust in information technology and metrology and to serve as a trusted source of rigorous, independent, and u……
- NIST Computer Security Resource Center — Special PublicationsreferenceUS-Government-Public-Domain
What was read from this (1 of 23 passages) aft) NISTIRs. ITL Bulletins: Current list of NIST Information Technology Laboratory (ITL) Bulletins. White Papers: Consists of NIST Cybersecurity White Papers; NCCoE Project Descriptions, Building Blocks and Use Cases; and other NIST-authored papers that are not part of a formal series. Includes current (Final and Draf……
- OpenJDK Java Language Specification — SE 21standardnot yet verifiedfull text not retrievableGPL-2.0-with-Classpath-Exception (code); Spec proprietary Oracle
- Oracle Java SE Language Specification (JLS)standardnot yet verifiedfull text not retrievableProprietary (Oracle)
- Samevian Canonical Seed (Technology)textbookfull text not retrievableCC-BY-4.0
What was read from this (1 of 6 passages) Operating Systems manage hardware and software resources. Core functions: process management (scheduling, context switching), memory management (virtual memory via paging/segmentation), file systems (hierarchical storage, journaling), and device drivers. System calls (read, write, fork, exec, mmap) form the user-space/……
at the source ↗
Astronomy 5 sources
- ESA Open Access PublicationsreferenceCC-BY-4.0
What was read from this (1 of 114 passages) mological parameter results from the final full-mission Planck measurements of the CMB anisotropies. We find good consistency with the standard spatially-flat 6-parameter ΛCDM cosmology having a power-law spectrum of adiabatic scalar perturbations (denoted "base ΛCDM" in this paper), from polarization, temperature, and……
- NASA SH0ES / Riess et al. 2022referenceCC-BY-4.0
What was read from this (1 of 118 passages) , Stefano Casertano , David O. Jones , Yukei Murakami , Louise Breuval , Thomas G. Brink , Alexei V. Filippenko , Samantha Hoffmann , Saurabh W. Jha , W. Darcy Kenworthy , Gagandeep Anand , John Mackenty , Benjamin E. Stahl , Weikang Zheng View a PDF of the paper titled A Comprehensive Measurement of the Local Value of……
- Nobel Prize Lectures in Physics (Nobelprize.org)peer_reviewedlicence not recordedfull text not retrievable
- OpenStax Astronomy 2etextbookfull text not retrievableCC-BY-NC-SA-4.0
- OpenStax University Physics Volume 1textbookfull text not retrievableCC-BY-NC-SA-4.0
Sciences 3 sources
- NIST — Physical Measurement LaboratoryreferenceUS-Government-Public-Domain
What was read from this (1 of 57 passages) on that relies on accounting for measurement errors before testing materials or developing products. ‘Spooky’ Particles Transit DC Suburbs, a Step Toward a Quantum Network August 5, 2026 The achievement shows that fragile quantum entanglement can survive even in tough, real-world conditions. NIST Recognition and Accred……
- NOAA Ocean Explorer — EducationreferenceUS-Government-Public-Domain
What was read from this (1 of 57 passages) collected during ocean expeditions that we support, including those on NOAA Ship Okeanos Explorer . Digital data collections typically include oceanographic and geophysical parameters, video, images, documents, and other information, provided in a range of data formats and held in NOAA archives. Physical samples are ar……
at the source ↗ - USGS Science ExplorerreferenceUS-Government-Public-Domain
What was read from this (1 of 41 passages) Maps Overview The National Geologic Map Database (NGMDB) is a distributed archive of geoscience information for the Nation. It was mandated by the Geologic Mapping Act of 1992 and is cooperatively built and maintained by the USGS and State Geological Surveys. We welcome you to explore the archive, view the maps, and he……
at the source ↗
Web standards 3 sources
- IETF RFCs — Internet StandardsstandardIETF-Trust-Legal-Provisions
What was read from this (1 of 68 passages) RFC 3000 , RFC 4001 , RFC 5000 , RFC 6001 , RFC 7001 , RFC 8000 , RFC 9000 , RFC 10001 , RFC 10042 . RFC Number Title Publish date RFC 1 Host Software April 1969 RFC 2 Host software April 1969 RFC 3 Documentation conventions April 1969 RFC 4 Network timetable March 1969 RFC 5 Decode Encode Language (DEL) June 1969 RFC ……
- MDN Web Docs (CC BY-SA 2.5)referencefull text not retrievableCC-BY-SA-2.5
- W3C Technical Reportsstandardfull text not retrievableW3C-Document-License-2015
Biology 2 sources
- NIH PubMed Central Open Access (CC BY subset)peer_reviewedlicence not recordedfull text not retrievable
- OpenStax Biology 2etextbookfull text not retrievableCC-BY-NC-SA-4.0
Computer science 2 sources
- ACM Digital Library Open Access (CC BY subset)peer_reviewedlicence not recordedfull text not retrievable
- MIT OpenCourseWare EECSreferencelicence not recordedfull text not retrievable
Physics 2 sources
- CERN Open Access Repositorypeer_reviewedlicence not recordedfull text not retrievable
- The Feynman Lectures on Physics (Caltech)textbooklicence not recordedfull text not retrievable
Chemistry 1 source
- NIST Chemistry WebBookreferenceUS-Government-Public-Domain
What was read from this (1 of 8 passages) meritus W. Gary Mallard NIST reserves the right to charge for access to this database in the future. Search Options Jump to top of page General Searches Physical Property Based Searches Formula Name IUPAC identifier CAS registry number Reaction Author Structure Ion energetics properties Vibrational and electronic energ……
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This is the corpus, not per-lesson citations. Which lesson came from which source is recorded but not yet published. When it is, it will appear on the lesson itself.