University of Illinois
University of Illinois Extension: Constructing an Egg Candler
Directions on how to make a device to candle eggs, or check on the progress of the chicken embryo. Links to numerous incubation and embryology resources.
University of Illinois
University of Illinois Urbana Champaign: Chickscope: The Journey Begins
Journey with the chicken egg, from formation to hatching, and learn about its embryology.
Other
Kiddy House: All About Chickens for Kids and Teachers
This comprehensive resource features everything you want to know about chickens. Students and teachers will "cluck" when they explore this site.
Virginia Tech
Virginia Cooperative Extension: 4 H Virtual Farm: Poultry: Virtual Hatch Project
A virtual chicken-hatch project takes students into the world of egg incubation and embryonic development.