What Do I Know Directions: 1. Before watching the presentation write down what you already know about the digestive system. This can include organs and body parts involved in the system, the roles played, how the body uses the system on daily basis, etc. 2. Discuss as a class what you wrote down. 3. After the presentation is over, make a list describing anything you learned and did not previously know. 4. Discuss as a class what was learned. Note any changes in the lists and whether you were surprised by the facts of the system.