Students explain the process of polymerization. In this chemistry lesson, students produce carboxylesterase in the lab. They test its effectiveness in removing the by-product odor.

Students separate food coloring using liquid chromatography. In this chemistry lesson, students explain the effects of different solvents on the rate of separation.

Learners hypothesize about the amount of carbon dioxide in soda bottles. In this chemistry lesson, students design an experiment to solve the problem. They share findings in class.

Students explain the importance of the five main biogeochemical cycles. In this chemistry instructional activity, students discuss how ions are transported in the environment. They design an experiment to collect data on eutrophication.

Students investigate friction between different surfaces. In this physics instructional activity, students research biomaterials that can reduce friction. They calculate efficiency using a mathematical formula.