Here's a page with a good description and examples of rotational symmetry.
Here's a SMARTBoard file for sorting objects using the property of symmetry.
Here's a nice idea for using natural materials to explore symmetry.
Here's a terrific video on symmetry that looks at the science of symmetry and explains how the symmetry of animals tells us more about them.
Here's a terrific idea for making paper models of symmetrical structures.
Here's a cool activity for making symmetrical bugs.
Here's a nice idea for creating designs using radial symmetry.
Here's a nice anchor chart on symmetry.
Here's a simple set of cards showing line symmetry.
Here's a terrific idea for using pattern blocks to teach symmetry.
Here's a really nice idea for making pattern block quilts while studying symmetry.
Here's a page with a number of templates and directions for making paper chains. These are very cool and there must be something mathematical we can do with them!
Here's a page on finding and drawing lines of symmetry.
Great journal entry for teaching about symmetry.
Here's an apple pie themed SMARTboard game for drawing lines of symmetry.
Here's another mandala lesson focusing on lines of symmetry.
Here's a lesson on creating a mandala that uses understanding of radial symmetry, measurement, and fractional parts.
This site has a number of projects focused on symmetry. Directions are easy to follow and use readily available materials.
Here's a post with some ideas for folding symmetrical origami creations.
Here's a nice anchor chart for symmetry.
Fun idea for students to create a silly face or other picture using symmetry and congruent shapes.
Here's a post with a number of ideas for using pattern blocks to teach symmetry.