This lesson is about lines of symmetry.  Students will learn and practice lines of symmetry on many objects in a variety of ways.   Credits: Opening image: http://images.all4ed.org/social-distancing-spots/ 

This activity allows students to explore reflective symmetry. They are asked to color a given arrangement of triangles in symmetric patterns using specific numbers of colors. The Teachers' Notes page includes suggestions for implementation, discussion questions, ideas for extension and support, and printable sheets

This activity allows students to investigate line symmetry and reflections. Using a mirror, students locate the lines of symmetry. in a square and then proceed to find other shapes by reflecting parts of the square. Ideas for implementation, extension and support are included along with a printable worksheet of squares (.doc)

Use this Venn diagram to get students thinking about the different types of symmetry as they use the mathematical practices.

This lesson plan created by Tanner Dance at the University of Utah includes a video and plan for teaching dance, symmetry, angles, and perimeter. The plan includes a warm up and various dance/math integration activities.

This problem challenges and extends students' spatial awareness with 2D shapes. The students are given three different irregular shapes. The goal is to divide each of them into two parts that are exactly the same shape and size. The Teachers' Notes page offers rationale, suggestions for implementation with a link to Happy Halving (cataloged seperately), discussion questions, and ideas for extension and support.