Seventh graders design an experiment to determine how light travels. In this physics instructional activity, 7th graders collect and analyze data. They formulate a conclusion and share results with the class.

A review of the principle of proximity as it applies to visual communication. Ends with a poster project lesson that underscores proximity and related concepts.

College-level instructor's notes on two key principles of design: similarity and proximity. Collage project how-tos also provided.