SLAC Virtual Visitor's Center - A description of the accelerator, detectors, and experiments being done at SLAC

Fermilab Education Office - Particle physics information and educational resources from Fermilab in Illinois

The Particle Adventure - Overview of the Standard Model of particle physics, including types of accelerators and detectors

BaBar Particle Physics Teaching Package - Tutorial for teachers or students, including relativity and particle physics

Contemporary Physics Education Project (CPEP) - posters and other resources illustrating the fundamental nature of matter and energy

Particle Physics Education Materials - Classroom activities from CPEP dealing with particle physics and measurement

Top Quark Data - Use actual data from Fermilab to calculate the mass of the top quark using conservation of momentum

Seeing Particles - Look at bubble chamber photographs of particle tracks and learn how to identify particles

Neutrinos - Tutorial, links, articles about recent discoveries of neutrino oscillations

World of Beams - Animations show how particle beams are accelerated, turned, and focused

more Particle Physics sites - links to many more sites; information, experiments, educational resources (some overlap with list above)