This is a PowerPoint presentation to teach primary children about triangles. It supports CCSS in geometry and writing. There are video clip links from YouTube using a safeshare.tv link to protect from having advertisements popping up during viewing. This is a flip lesson where students will learn about the attributes of triangles as well as modeling how to recognize, describe and write about triangles and then apply what they have learned. There is a template at the end of the PowerPoint that the teacher can print. Enjoy!