Learn Math Fast Volume 4 Fourth EditionVolume 4 is what sets us apart from other math curricula. Many students get lost in math when trying to learn fractions and pi in the same year. That's why we waited until after pre algebra to introduce topics such as circumference and area. It's only fair to teach a student how to use variables in a math equation before giving them a formula such as A = 1 2 bh. This volume is the shortest in the Learn Math Fast series. Most teenagers can complete it