Modeling Chemistry: Rearranging Units 2 and 3

The current curriculum resources for Modeling Instruction in Chemistry present the following as units 2 and 3:

Unit 2: Energy – Particles in Motion

Unit 3: Energy & States of Matter

This blog post will make a case for switching these two units around in order to lead to greater student understanding of both the particle model and the energy model. First, I’m going to briefly describe each activity in the units as written and why they are important for model development. Then I will describe suggested modifications for the rearrangement and explain why I think they are beneficial.  Continue reading