Other
Meade Instruments Corporation: How Telescopes Work
This page explains in fairly simple terms the basics of telescopes. It includes information on the various types of telescopes and the factors people use to select the correct telescope for them. Meade is a leading telescope manufacturer.
Exploratorium
Exploratorium: Make Your Own Telescope
At this site students can make their own telescope and see how it works with this experiment. Out of a light, a pair of glasses, a magnifying glass and wax paper.