This is an easy and fun way to review the water, carbon, nitrogen and phosphorus cycles for AP Environmental Science and other advanced sciences (grades 9-12). For this formative assessment, students walk around, at their own pace, reading and answering specific questions related to the carbon, nitrogen, water and phosphorus cycles. Students record their answers on their student document, which is designed as a "self-check" for the student -- it is obvious when/if they mess up and signals them t