## Topic:

Making ten

**Standards**:

CCGPS: MCC2.OA.1. Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing with unknowns in all positions., e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

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 Question**:

How do we make 10?

## Duration:

about 1 hour

## Materials:

math games, word problem, ten frames

## Overview or notes pertaining to lesson:

Students will practice making ten and review patterns and addition.

## Mini Lesson:

The mini lesson will help the independent work groups do their jobs today; it does not address the essential question. Write the problem on chart paper (from Super Source): Children in Mr. Brown’s class are collecting aluminum cans to recycle. They are following a pattern while they collect. On day 1 they collected one can. On day 2 they collected two cans. On day 3 they collected three cans. On day 4 they collected four cans. What pattern are they following? How can the pattern help you find out how many aluminum cans they will have in all by the end of day 10?

## Guided Practice:

During mini lesson do the Read and Understand and Plan steps of the problem solving process for this question (plan to solve using manipulatives and a picture. Give students the **chart **which they will use with the manipulatives and instruct them to draw in their journals after using manipulatives and answer the question completely.

## Independent Practice:

Split students into groups: Group 1: odd/even game, tic-tac-toe addition, pattern activity, or salute (you decide what you want them to do, or allow a choice), Group 2: teacher-use 10 frames to practice different ways to make 10 with red/yellow chips. Write the combinations for making 10, Group 3: odd/even game, tic-tac-toe addition, pattern activity, or salute, Group 4: math addition activity on the computers or smartboard (I have 3 computers in my classroom, so the other 3-4 students in the group work at the smartboard. I usually have about 6 kids in each math group.) After about 10 minutes, clap for attention, clean up, and rotate. Remember to correct behaviors immediately and praise good behaviors. Feel free to switch up any of those math games with others at any time.

## Closing:

Journal Entry: Review the can collection math problem if all groups have finished the problem.