Particle Adventure An interactive tour of quarks, neutrinos, antimatter, extra dimension, dark matter, accelerators and particle detectors.
http://particleadventure.org/ (Added: 12/27/00))
Visual Quantum Mechanics Instructional units that introduce quantum physics to high school and college students who do not have a background in modern physics or higher level math.
http://phys.educ.ksu.edu/ (Added: 12/27/00))