The United Cerebral Palsy runs a program in Illinois called the Adaptive Technology Exchange Network (ATEN) which takes most any old tech, refurbishes and donates to schools while training kids and adults on useful, real-world technology skills.

I've given them close to a 100 various old computers, dozens of CRTs, and misc audio/video gear (you'd think a perfectly working Sony uMatic 3/4" deck would have some value, but no).