Resources to help elementary, middle school, and junior high school students and teachers understand the particle nature of matter, the use of scientific models, and physical and chemical changes involving matter.

The following modules are designed to help students (ages 10 -15) understand the nature of scientific models and how a variety of 'good enough' models can be used to understand the particulate nature of matter, physical change, and chemical change.

Click on the image below to go to the applet menu. Each applet is accompanied by a Teaching Guide (just click on the Teachers Resource menu item).