This short video and interactive assessment activity is designed to teach fifth graders about determining whether various shapes have lines of symmetry.

This is an instructional task that gives students a chance to reason about lines of symmetry and discover that a circle has an an infinite number of lines of symmetry. Even though the concept of an infinite number of lines is fairly abstract, fourth graders can understand infinity in an informal way.

This task provides students a chance to experiment with reflections of the plane and their impact on specific types of quadrilaterals. It is both interesting and important that these types of quadrilaterals can be distinguished by their lines of symmetry.

This task is intended for instruction, providing the students with a chance to experiment with physical models of triangles, gaining spatial intuition by executing reflections.

In this task, students will apply their knowledge of polygons and their properties to create “New-Fangled Tangram” puzzles.  Students will need to pull from their understanding that polygons may have shared attributes, utilize visual-spatial skills, and employ a variety of problem solving strategies. Additionally, students will need to prove that their puzzles were designed correctly by using a variety of tools and apply fourth grade knowledge of polygons.  This lesson was developed by NCDPI as part of the Academically and/or Intellectually Gifted Instructional Resources Project. This lesson plan has been vetted at the state level for standards alignment, AIG focus, and content accuracy.

This short video and interactive assessment activity is designed to give fifth graders an overview of reflective symmetry.

This course was created by the Rethink Education Content Development Team. This course is aligned to the NC Standards for 4th Grade Math. 

This course  was created by the Rethink Education Content Development Team. This course is aligned to the NC Standards for 4th Grade Math. 

Looking to test your knowledge of symmetry and rotational symmetry? Check out ABCya's SymmeTree! Follow lumberjack Sammy Tree as he guides you through the lesson, then chop-til-you-drop!