History of Microscopy
The microscope opened our eyes to a previously unseen world. See some of these interesting historical narratives for more of the history of microscopes.

• The History of the Microscope (a brief history, from Microscopy-UK, an amateur microscopy site)
• Biographical information about Antony van Leeuwenhoek, a pioneer in biological microscopy. There's Leeuwenhoek Legacy (a review of Brian Ford's book about his discoveries in the archives of the Royal Society of London) and the Leeuwenhoek site at UC Berkeley.
• UC Berkeley also has a short biographical page on Robert Hooke, who's book Micrographia is a classic in biological microscopy.
• Rockefeller University has an all-to-brief page hinting at the history and importance of the electron microscope in cell biology. The page is called Journey into the Cell.
• For electron microscopy there's Bernie C Breton's The Early History and Development of The Scanning Electron Microscope.

• The Moody Medical Library's collection of historical microscopes (University of Texas Medical Center at Galveston)
• 19th Century American Microscope Makers (AmericanArtifacts.com)
• Museum optischer Instrumente - Mikroskope (descriptions are in German, by Timo Mappes)
• Antique microscopes & accessories (ARS machina.com)
• Museum of Microscopy (Molecular Expressions, Florida State University)
• The Jerome J. Paulin Electron Microscopy Museum (University of Georgia)

On-line Adventures in Microscopy
Here are some fun places to visit that use microscopy:

• Cells Alive!
• Marly Cain's Amazing Micronautic Adventures®
• The Microbe Zoo (Michigan State University)
• The Ant: A Morphological Tour of the Super Organism (Jason Libsch, Wesleyan University)
• WebCytology and Cellupedia (ThinkQuest Contest Winners)
• The Visible Embryo (Sponsored by a Small Business Innovative Research Grant from The National Institutes of Child Health and Human Development)

An Introduction to Optics & Microscopy
Optics can be a complex subject for K-12 students. Here are some interesting sites that keep the physics to a manageable level.

• Optics for Kids (Optical Research Associates)
• Colorworm Teaches about Color (Pat Ellison, IUPUI)
• How Light Works (www.HowStuffWorks.com)
• Light & Optics (Arizona State University)
• Seeing Exhibits (The Exploratorium)
• Introduction to Optical Microscopy and Photomicrography (more advanced mathematics & science skills required, Molecular Expressions - Microscopy Primer, Florida State University)

Curricula, lesson plans & other resources
Here are some microscopy and/or imaging related materials for teachers.

• Microscopes, Cells, DNA and You (University of Washington)
• Project Micro (Microscopy Society of America) This excellent site is the work of Caroline Schooley, a retired microscopist, and includes an extensive bibliography. Her work has resulted in a Great Explorations in Math and Science (GEMS) book on microscopy. There are companion exercises to the book at the Minnesota Microscopy Society and at Cornell University.
• Cell Biology: Advanced Microscopy for the Teaching Laboratory (Douglas Kline, Ph.D., Dept of Biological Sciences, Kent State University)
• Summer Optical Science and Engineering Course (New Jersey Institute of Technology)
• Microscope Labs (Boston Museum of Science)
• Microscopic Adventures (GreatScopes.com)

WWW Resources
These sites include links to other useful microscopy & biology related web sites:

• Optics for Kids (Optical Sciences, University of Arizona)
• K-12 Educational Microscopy and Young Scientist Websites (Molecular Expressions, Florida State University)
• Resources for Schools (House Ear Institute)
• Precollege Curriculum Activities (American Society for Microbiology)
• Selected Microscopy Resources for K-12 Education (MicroWorld: Guide to Online Microscopy and Microanalysis Resources)
• Educational Web Sites (Electron Microscopy Outreach Program, San Diego State University)

Amateur Microscopy
A couple of web sites for those interested in microscopy as a hobby:

• Microscopy-UK (probably one of the best amateur microscopy sites out there, with a great deal of helpful information for the new hobbyist)
• Photomicrography (Steve Durr's home page)

Buying a Microscope
These links are for teachers or hobbyists interested in advice about purchasing a microscope:

• Buying Microscopes (ProjectMicro, Microscopy Society of America)
• Choosing a microscope (Microscopy UK and Brunel Microscopes)
• How to buy the Right Microscope (GreatScopes.com)