I can not begin to tell you how much I love using this model in my class. It demonstrates weathering, erosion, and deposition (without the use of stations, water, or sand!) at a minimal cost. It is a hands-on model that takes very little class time and just a small amount of teacher monitoring. The model runs for 3-5 days using just a few minutes of class time at the beginning of each day. After the model has run, the students write a paragraph explaining the model.
Included in this product are complete directions for using the model, a writing prompt with word bank, paragraph rubric, and a sample paragraph.