The mathematics are designed for ages 11-13 New Mexico State University Learning Games Lab created this site, which aims to provide "smart and yummy educational animations, mini-games, and interactive tools that help mid-school learners better understand math concepts." The site's ever-growing collection of "snacks," are highly entertaining educational movies and games that focus on specific mathematical concepts, each requiring only a small amount of time.
M for multiply, A for add, and D for denominator. Then, using the example, walk students through each step: multiply the whole number by the denominator, add the numerator, and keep the denominator the same. When they forget, all you have to say is “Make it MAD!”