This powerpoint introduces students to the concepts of external and internal force.
It contains a task for students to complete, as well as opportunities for discussion and reflection.
*Please note- in the slide that says, "Using the materials provided", I give each student (or each pair, depending on time and resources) a little envelope that contains some random supplies from around my classroom. There are usually a few strips of paper, a piece of masking tape, string, a paper clip, etc. How many supplies you give them will determine how long the task takes to complete.*