The Wild Classroom
The Wild Classroom: Biomes
This excellent resource explores all of the biomes found on planet Earth! A side menu indicates the world's biomes and provides details on each. Colorful interactive maps, video clips, lesson plans, species profiles, and so much more...
Discovery Education
Discovery Education: Habitats of the World
This site has a lesson plan to use to start a unit on biomes and animal habitats. This plan incorporates grasslands, temperate forests, tropical rainforests, deserts, polar ice regions, and tidepools.