One of my colleagues at BFS showed me this site, another way of organizing web resources. I like the function that helps kids cite resources correctly!
YouTube clip explaining USDA organic certification levels (100%, 95%, etc.) This is one of a series of videos addressing issues related to organic food (irradiated food, conventional processing, etc.)
This is a brief article from Vegetarian Times magazine. It addresses some questions about the benefits of buying organics, which are often more expensive.