In Topic H students will begin to see patterns when adding 0 and 1, and find the number that makes 10 when added to a given number (K.OA.4). Lesson 37 explores the additive identity: zero. Students learn that adding or subtracting zero doesn’t change the original quantity. In this lesson students will also begin to see the inverse relationship of addition and subtraction. “There were 8 children playing. Two more came to play. Then there were 10. But then 2 children had to go home. Then there were only 8 children playing.” (8 + 2 = 10; 10 – 2 = 8.) Lesson 38 uses 5-groups to see patterns when adding 1. Once again, focusing on the 5-group will help move students to Level 2 counting on strategies. Lessons 39 and 40 focus on making compositions to 10. “How many more does 6 need to make 10? Draw a picture of 6 in a 5-group. How many do you need to draw to make 10? Let’s make a record of that with an addition equation.” (6 + 4 = 10.) This module is concluded with a culminating activity that calls on students to use what they have learned to teach others how to think about a part–part–whole situation. Students choose tools strategically to model and represent a stick of 10 cubes broken into two parts. This is an excellent opportunity to bring in another class, family members, administrators, or community volunteers to serve as enthusiastic “students” for individual student presentation.

## Kindergarten Mathematics Module 4, Topic H

## Downloadable Resources

## Common Core Learning Standards

CCLS | State Standard |
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K.OA.1 | Represent addition and subtraction with objects, fingers, mental images, drawings2, sounds (e.g.,... |

K.OA.2 | Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using... |

K.OA.4 | For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by... |