Education Portal

↓ Critical Thinking & Logic:

• Approaches to Critical Thinking
• Critical Thinking on the Web
• Critical Thinking
• Critical Thinking Web (contents)
• Knowledge Management
• Logic café
• Pluralistic Ignorance
• Semiotics for Beginners
• The Skeptics Guide to the Universe

Fallacies:

• Fallacy files
• Infidels.org
• Labossiere's list
• Rhetoric
• Rulebook for Arguments
• Skeptics Guide to the Universe
• Stephen's Guide
• Jargon fallacies

↓ History:

1. History net
2. History Buff
3. Ancient Rome
4. International Constitution finder
5. Library & Archival Exhibitions
6. Mankind Timeline: (accuracy questioned)
7. Spartacus

United States

1. Constitution
2. Framer's
3. Ghost Cowboy: news from the American Wild West

↓ Maps:

1. University of Texas Perry Castaneda Library Map Collection: see this especially fine world relief map with political borders
2. Mappa Mundi
3. Map Room - blog
4. Nations online
5. Google: earth, maps
6. Maps On Us
7. Open Street Map: open source
8. Ordnance Survey: U.K. mapping
9. Rumsey collection
10. Shaded Relief: high quality relief maps of the world (public domain?)
11. U.N. Cartography section
12. U.S. Government:
    • Library of Congress
    • National Map
13. Roads & Travel (mostly U.S.):
    • Map Blast (MSN)
    • Map Quest

Satellite Photos

• Satellite photos
• Digital Globe
• Acme mapper
• Confluence pics
• NASA: Visible Earth, World Wind, Astronaut photos
• Terrafly
• Terra Server

Misc.:

• Barrington Atlas of Greek & Roman World
• Environmental
• Free Map: create and color your own country, continent, or world map
• GPS Tuner
• Nuclear Waste Routes

↓ Multi-topic:

• Ask Oxford: Q & A
• Ed Surf - links
• arXiv.org
• Awesome Library
• Big Chalk
• Cite Seer: primarily computer and info science
• Education blogs
• Education-World
• Exploratorium
• Fathom
• Public Library
• Scholarpedia: wiki
• Science Magazine archive: articles over 1 year old are free
• Science blogs
• Study Web
• Think Fountain - 50 topics

↓ Philosophy:

1. Philosophy - links
2. Cognitive Daily
3. Consciousness papers - links
4. Mixing Memory
5. Philosophers
6. Philosophical videos
7. Philosophy forums
8. Philosophy Encyclopedia
9. Polylog - Intercultural Philosophy forum
10. Skeptics Dictionary
11. Sun Tzu & Chinese Philosophy
12. Women philosophers

↓ Reference:

1. 1911 Encyclopedia
2. American Heritage Dictionary
3. Biography
4. Census
5. Columbia Encyclopedia
6. Fact Monster
7. Fed Stats
8. Geography
9. i-Encyclopedia
10. International System of Units (SI)
11. Languages
12. Material Safety Data Sheets (glossary)
13. Nation Stats
14. Periodic Table of Elements
15. Periodic Table of Geologic Elements
16. Plants
17. Population
18. Public Library of Science
19. Scholarly Journals - Directory of open access journals
20. School Library Resources - links
21. Stats.org

↓ Astronomy:

• Astronomy Notes: online textbook
• Astro Find: search engine for astronomy
• Space Weather
• Universe
• Blogs:
  • Bad Astronomy: astronomy and skepticism
  • Chris Lintott's Universe
  • New Scientist Space
  • Space.com
  • Starts With a Bang!: Astrophysicist Ethan Siegel
  • Universe Today
• Charts & Photos:
  • Astronomy Photo of the Day: space and earth photos
  • Astronomy sky charts: planets, stars, and constellations
  • Sky Maps: sky chart for current month
  • Stellarium: excellent open source sky chart application (Linux, Mac, Windows)
  • This week's sky at a glance: current sky trivia
  • Blue Marble: photos of Earth from space
  • Eclipses
  • Sky server
  • Solar System Simulator
  • Space Imaging
  • Cloudy Nights (forum): telescope news, astronomical community

↓ Biology:

• Tree of Life: phylogeny
• Encyclopedia of Life
• Fish
• Infrared Zoo
• Insects - links
• What's that bug
• Open Wetware: biology wiki
• Talk Origins: discussion of evolution (and creationism, FAQ)
• Animal tracks

↓ General Science:

1. International System of Units (SI)
   • see also: Rowlett's description of SI
2. Science - search engine
3. Physical Review Focus: American Physical Society
4. AmericanScientist
5. Ask a Scientist
6. Complexity Digest
7. Geology.com: plate tectonics
8. History & Politics of Geology
9. Lenses
10. Microscopy
11. MIT's open courseware
12. National Academies Press
13. New Scientist
14. Public Library of Science
15. Science Gems
16. Science Hack: videos
17. Science Hobbyist
18. Science Live: lecture and lab videos
19. Great Moments in Science

Chemistry:

• Balloon molecules
• Chemistry experiments
• Chemistry foundations

Technology

1. Free Tech Books
2. Tech Books for Free
3. see also: Computers - mostly avocational

↓ Mathematics:

• Math Forum: Ask Dr. Math
• Math Land
• Math World
• Planet Math - encyclopedia
• Web Math

Calculus:

• Garrett
• Integrator
• Keisler
• Shchepin
• Sloughter

Statistics:

• Electronic Journal of Probability
• Pitfalls of Data Analysis
• Problems with Statistics
• Sampling
• Statistics for Journalists: Someone else's data

Misc.:

• Archimede's Palimpsest - from 300 BCE
• arXiv.org: collection of math papers awaiting publication
• Classic fallacies (e.g. 1=2)
• Curious Math
• Cut the Knot - interactive mathematics and puzzlers
• Elements of Euclid
• Famous Curves
• Fibonacci & Golden Section
• Game theory
• Geometry Center
• Handbook of Applied Cryptography
• Intro to Codes & Cyphers - oversimplified
• Integer sequences
• Math-Atlas
• Pi

↓ Physics:

• How to become a good theoretical physicist: papers and resources (by Gerard 't Hooft)
• Feynman:
  • Feynman Lectures on Physics
  • Feynman's 4 lectures on light: video
• Light & Matter
• Museum of unworkable devices
• National Science Digital Library
• New Science Paradigms
• Science Museum
• Physics Education Technology: simulations
• Physics for future Presidents
• Science Toys
• Sandlot science
• Shodor interactive
• 10 beautiful experiments
• Torque & power
• Physics Buss: blog

Electricity:

• Electric Circuits