The Human Calculator

Ashley is upset when her classmate, Madison, is much better at math than she is. It seems like Madison just can't get a single answer wrong. Ashley's envy gets the best of her when she tells her classmates that Madison has had a calculator implanted in her head! Young readers will eagerly follow the mysterious story, the charming illustrations, and the tricky math problems to determine whether Madison is very smart...or if it's something more.