A new treasure trove of stories that make mathematical ideas come to life with an unusual cast of characters. This book explores mathematical concepts and topic

Explores mathematics through stories, puzzles, challenges, games, tricks, and experiments. Answers are provided in a separate section.

Penrose is back, and ready to usher young readers along as he encounters more amazing mathematical ideas in a sequence of adventure tales. At once demystifying

Literacy-it's not just for English teachers anymore. The new Common Core English Language Arts Standards aren't just for English teachers. Fluent reading and wr

Penrose the cat explores and experiences a variety of mathematical concepts, including infinity, the golden rectangle, and impossible figures.