Before Lesson: Show addition video, afterwards talk about stratieges you have used to add numbers.
1. Student engagement - Ask students to tell their shoulder partner two numbers that when added together equals 9.
2. Write the number 20 on the board. Ask students to write on their whiteboard or an index card any way that they want, to make 20. Walk around and help those that need assistance. After a few minutes, call out: “Who used the strategy 10 + 10?” having students raise their card or board. Continue to ask possibilities: 11 + 9, and have students who used 11 + 9 raise their card or white board. Keep going for 12 + 8, 13 + 7, 14 + 6, 15 + 5, 16 + 4, 17 + 3, 18 + 2, 19 + 1 and 20 + 0
3. Divide the class into groups of two, three, or four. Give each group a different colored marker. Tell the students they will have three minutes for each station (Give more or less time when needed). Students are to work together and show all their work. When you model each station, use various methods and pictures to solve problems.
**Have base 10 blocks or counters out if needed.
4. There will be stations and each station will have a problem. The students are to work together to solve each problem. All work is to be done and shown on the chart paper. Encourage students to use counters, tally marks, or base 10 blocks or sticks as they would in class.
(Problem written on the top of the chart paper)
Use a strategy to write an addition problem that equals 11.
*If you have a struggling student start them here.
Use a strategy to write an addition problem that equals 17.
Use a strategy to solve the word problem.
Jane is planting a garden. She has 5 roses, 7 daisies, and 4 lilies. How many flowers does she have? Show your work.
**Extension - How many more does she need to buy to make 20?
Use the number line to solve the problem
9 + 9.
**Make sure you draw a number line with at least 20 numbers.
***Extension - Use the number line to show three ways to make 18.
Throw the dice three times and add up the numbers.
**Extension - Draw the dice faces you would need to add together to make 14.
Add the numbers 4 + 3 + 5 + 2 by drawing a picture to solve the problem and check your work using a calculator.
The first time you use this type of lesson walk around the room and read, explain, and work each problem using the same colored marker (this way the students can look at your solution). Make sure you place the chart paper on the students' level and that you have an extra piece behind if needed.