Astroweb - A vast number of astronomy sites organized by category

Educator Resources

• Space Science Education Resource Directory
• NASA Resources for Educators
• NASA JPL Education Resources
• NASA AMES Educational Resources
• NASA GSFC Educational Programs K-12

General Astronomy

• Windows to the Universe
• Webstars
• CASS Astronomy Tutorial
• Astronomy Course from the University of Tennessee

Astronomy For Kids

• NASA KIDS
• The Space Place from JPL
• Astronomy For Kids
• Starchild - A Learning Center for Young Astronomers

Electromagnetic Spectrum

• Imagine the Universe - Electromagnetic Spectrum
• The Electromagnetic Spectrum (GSFC)
• What Are Those Squiggly Lines? - Using Light to Learn About the Universe
• The Electromagnetic Spectrum (Univ of Tennessee) - lots of material + interactive java applets
• Electromagnetic Particles and Waves (Univ of Colorado)

• Eyes on the Sky Feet on the Ground - Hands on Astronomy Activities For Kids
• CERES Project Educational Activities

X-ray Astronomy

• Chandra Education Resources
• High-Energy Astrophysics Learning Center
• Rossi X-ray Timing Explorer Learning Center

Ultraviolet Astronomy

• The Center For EUV Astrophysics - Science Education

Visible Astronomy

• Education at Hubble's Space Telescope Science Institute

Infrared Astronomy

• Infrared Astronomy (IPAC)
• 2MASS Public Outreach and Education
• Live from the Stratosphere - Kuiper Airborne Observatory
• SOFIA's (Stratospheric Observatory for Infrared Astronomy) Education Page
• UNITED's SOFIA site

Radio Astronomy

• A Radio Astronomy Tutorial - Haystack Observatory
• National Radio Astronomy Observatory