Keep a cheap camera in your room so the kids can take pics of their tasks during stations. Just hang it at the station and they have someone take a pic of them when they finish a task. "Picture proof" of their hard work!
Camera- business card: have to try this trick.How to use a business card to bounce light up to create a nice overall illumination, while some of the light penetrates directly through the card, disperses and lights the subject from the front.
If you want a digital camera, but think you can't afford one, I have the solution for you. I actually have 2 solutions for you . There are lots of choices for a discount digital camera on the market at this time, the really cheap ones are junk. These 2 camera's are 2 good camera's that you can use to take good quality pictures. Nikon coolpix L19, and the Canon powershot A1100 IS. I'll show you why you would want the Nikon or the Canon.