Education
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Art of Problem Solving
A vast community and wiki archiving decades of competition math problems and solutions, from beginner puzzles through ol…
Art UK
The online home for every public art collection in the United Kingdom, showcasing artworks from over 3,000 galleries, mu…
Art With Flo
A digital art tutorial site built around Procreate, with lessons and guides for people learning to draw and illustrate o…
Art21
Free documentary films and interviews with contemporary artists, from the Art in the Twenty-First Century series to shor…
Artcyclopedia
An index of online museums and image archives that shows where the works of over 8,000 fine artists can be viewed on the…
Artful Kids
A blog of creative art activities for kids and the young at heart, from a lifelong art lover, with projects families can…
Artifact Guesser
A guessing game that shows real museum artifacts and asks you to name their date and origin, drawing on more than 230,00…
Artificial Intelligence: A Modern Approach
The companion site for the standard university textbook on artificial intelligence, with resources, code repositories, a…
Artima Java Corner
Artima's Java corner with articles, free chapters of Inside the Java Virtual Machine, and seminar handouts on exceptions…
Artists Network
An online resource for artists of all levels, launched in 2007, offering articles, tutorials, and inspiration across dra…
Art-Res
A hand-curated collection of free art resources and tutorials for learning to draw and paint, plus an idea generator and…
Arts & Letters Daily
A famously spare page from the Chronicle of Higher Education linking daily to notable essays, reviews, and articles abou…
arXiv.org e-Print archive
Open-access repository of millions of scholarly preprints in physics, mathematics, computer science, and related fields.
As Minerva's Owl Flies: The Dark Side of Hegel's Historicism
An essay in The Gadfly, an intercollegiate philosophy magazine, examining the darker implications of Hegel's historicism…
Asciify
A fast ASCII and Unicode reference where you search characters, toggle between standard and extended sets, and copy hex…
Asian Film Archive
A non-profit archive in Singapore preserving and sharing the film heritage of Singapore and Asian cinema, with collectio…
Ask a Mathematician / Ask a Physicist
A long-running Q&A site where working mathematicians and physicists answer reader questions on math and physics in clear…
Ask an Astronaut
Browse hundreds of student questions answered by astronauts aboard the International Space Station, from daily life in o…
Ask Ethan #18: Why Aren't We a Black Hole?
Astrophysicist Ethan Siegel explains why the early universe did not collapse into a black hole at the moment of the Big…
Ask the Pilot
Commercial pilot Patrick Smith answers reader questions and debunks common myths about flying in this long-running blog.
Ask vs. Guess Culture
An explainer on the ask versus guess culture divide, showing why some people feel fine making big requests and others hi…
AskNature
A searchable library of biomimicry examples showing how plants, animals and ecosystems solve design problems and inspire…
ASL Fingerspelling Practice
A free practice site from Dr. Bill Vicars that trains you to read American Sign Language fingerspelling, one word at a t…
ASL-LEX
A searchable lexical database of American Sign Language signs with videos and linguistic properties, built by sign langu…
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