A complete unit with direct instruction to the student, ample practice problems, and word problems. Common Core aligned. It is useful for class practice, independent practice, homework, and more.
This unit includes lessons that give lots of practice and reinforcement for the basic addition and subtraction facts to 18, using two tools: number rainbows and fact families. These lessons also include many word problems. Both number rainbows and fact families emphasize the connection between addition and subtraction as a tool to solve the basic subtraction facts, such as 13 - 8 or 15 - 6.
Learning and memorizing the basic addition and subtraction facts to 18 is very important for later study. For example, regrouping in addition and in subtraction requires that the student is able to recall all the sums of single-digit numbers and corresponding subtraction facts efficiently and fluently. The goal is to memorize these facts, or at least become so fluent with them that an outsider cannot tell if the student remembers the answer or uses some mental math strategy to get the answer.
I wish you success with math teaching!
Maria Miller, the author