Here’s a quick recommendation for Seeing Symmetry by Loreen Leedy.
This picture book explains the basics about line and rotational symmetry providing just enough information to explain what these are without being overwhelming.
The illustrations are clear and easily illustrate whatever point she’s writing about. There are lots of examples of symmetry taken from both the natural world as well as those items that are produced by humans.
Line symmetry is taught in grade 4 math in
and I think this book will be very useful for this level. Rotational symmetry is taught in grade 9 and
this book will not likely appeal to this age group. Alberta
Good addition for classroom collections that use picture books in math.