Learning about symmetry helps students learn how to classify objects according to the arrangement of their constituent parts. Ordering and classification are skills that are used throughout many daily tasks, and the ability to notice patterns or similarities will make these tasks much easier to carry out.
Materials (affiliate link):
Mirrors (they are from the dollar store)
Dry erase marker
Children have an innate sense of symmetry, they look for balance and order in the real world naturally. As teachers, it is important to build on this inner ability, as it is appealing to students. In addition, students are better able to learn a concept when they can relate to it, therefore teaching symmetry gives all students a chance for success.