Space Telescope Science Institute
Amazing Space: Telescopes From the Ground Up
Students can investigate the historical development of six different telescopes. The technical aspects of different telescopes are also presented.
Rice University
Galileo Project: The Telescope
This site from The Galileo Project of the Rice University provides an in depth history of the telescope and it's invention and growth over time. Too detailed for an Elementary student, but a great resource for an Elementary teacher.
Space Telescope Science Institute
Hubble Site: Telescope History
The Hubble Space Telescope site takes a look back through time at the history and discoveries of telescopes.