Math Tutor 3 - Version A Math Tutor 3 is a set of four tutorials that introduce the student to fractions. The first describes a fraction and introduces the terms numerator and denominator. It also shows the student how to determine what fraction of a group of blocks is red. The second tutorial shows them how to determine what fraction of a single object is colored red. The third tutorial shows the student how to read and write a fraction in words, and the fourth shows them how to add and subtract fractions with a common denominator. Each tutorial concludes with a set of five interactive problems.