How to be used in a lesson:The models should be shown to the students on the smartboard via the ppt and student discussions should be encouraged by the teacher before any explanations or "teaching" occurs. The model shows them what is going into the plant/animal and what is coming out or being released. Students should be able to list the things entering the organism/leaf and the things exiting. You can discuss states of matter with students, how water entering and leaving, but in a different st