This is a 2D geometry book. The book has the following vocabulary words: side, vertices, quadrilateral, parallel lines, geometry. The book has the following shapes to find #sides and #vertices for: hexagon, triangle, square, rhombus/diamond, parallelogram, rectangle, circle, oval, and octagon. The book gives teachers the option as to what to call the shapes, as many curriculums differ. The book is designed to be used with the 2D shapes that many math programs provide. At the end of the book, the children can cut out a set of 2D shapes or use the ones in your classroom, to design a picture.
I recently used this book on day 1 of our geometry unit,in my own classroom, and had many parents thank me for sending it home. Parents explained that the vocabulary helped them help their children with their homework.