The three books in the popular Shapes in Math, Science and Nature series, Squares, Triangles and Circles, provides engaging, well-written, interactive content that helps make geometry and measurement concepts graspable and even enjoyable, while also offering opportunities for lessons on a range of subjects from science, technology and engineering to social studies, art, and architecture. There are also numerous ideas for hands-on-learning activities --projects, puzzles, experiments -- that relate the text to everyday life.