## Topic:

Making 10 and 20

**Standards**:

**CCGPS: MCC2.OA.2 **Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.** **

**Essential Quest****ion**:

How do we make 10 and 20

## Duration:

About 1 hour

## Materials:

ten frames printed, color tiles, math games

## Overview or notes pertaining to lesson:

Students will practice making 10 and 20 so that they become more fluent when adding within 10 and 20. This lesson lasts for 2 days.

## Mini Lesson/Guided Practice:

Introduce new game: Hundreds chart game in which students roll dice and move their marker along the hundreds chart-adding what they roll. Show how to play and allow some practice/modeling by students

## Independent Practice:

Split into math groups pre-made by teacher according to pretests. **G****roup 1**: frames of 10-color and write number sentences to show how to make 10. **Group 2: **computer- math playground-number bonds/smartboard: dogbone, **Group 3: **me: make 20 with a 20-frame-color and write number sentences. **Group 4: **dice game with hundreds chart. Rotations are longer today-about 20 min, so we will only have 2 rotations. Finish the last 2 rotations the next day.

## Closing:

Review different ways to make 10 and 20.