# Introduce Compositions of Isometries

- Introduce key terms.
**Isometry**

Glide reflection - Have students view examples of isometries. This link takes you to Passy’s World of Mathematics where you will find examples of isometric drawings and 3D cubes.
- Teach students the concept of composition of reflection across parallel and intersecting lines.
- Teach students to recognize isometries by having them prepare a short lesson using ShowMe, an iPad app, or other tool then presenting to the class or other teammates. Go to this site for examples.

## Tips and Tools

After students create their ShowMe lesson, critique by highlighting Mathematical Practice 6, Attend to precision, on the Mathematical Practices Rubric.

Have students complete Daily Learning Logs.