This is a super fun activity to introduce feedback loops and the insulin/glucose connection! The .zip file includes a student handout with very visual notes on the first page. I have included the key for these notes as well. On the back, and with an accompanying powerpoint, is a "sugar stack" activity, where students get to guess (and then confirm!) how much sugar is really in the every day items they eat and drink (from Coke to Peanut Butter)! We had a lot of fun with this as an introduction to our diabetes unit!