I recently saw the science drawing notebook of a high school aged CM student, and was quite impressed. I hadn't thought of having the kids illustrate their science lessons, but it struck me as so logical and useful, and I resolved to have the kids start doing this. This morning I found an article by Karen Andreola about just this topic, and I thought others here might find it interesting.
http://www.home-school.com/Articles/illustrating-science-lessons-is-another-form-of-narration.html
How about others here - have you tried this? I'd love to hear what works at your house.
Blessings,
Aimee