You'll have to pick a biome to study. Start with these videos to learn what a biome is and what some of the different ones are that you have to choose from. Ask your teacher if you're not sure of the BrainPOP username and password!
Once you've picked your biome, one of the videos above could be a good way to get started with information -- then use these websites below.
Online Games & Activities
Food Chains/Food Webs
Other Biome Sites