I always found that my students had difficulty distinguishing between atoms, molecules, compounds, mixtures, solutions, chemical and physical changes. This activity will walk them through these pieces and attach a hands-on aspect to your lesson. I've had a lot of success with this, adding in the legos definitely makes the process of learning this a lot easier for many students. You start with the notes and PREZI, using legos to follow along, you then practice with an interactive notebook, and