Math K5 TEACHER'S EDITION with manipulatives. Manipulatives and creative activities are used to develop a good foundation of math concepts, such as number sense, time, money, fractions, addition, subtraction, and geometry. Farmer and Mrs. Brown and Cheddar introduce math concepts, build number sense, and develop problem solving skills. Student worktext can be ordered from bjupresshomeschool.com. Teacher's Edition new is $87.