1. Use Appropriate Tools MAFS.2.OA.1.1 (DOK 2)
Lesson 3.9
Use Appropriate Tools
MAFS.2.OA.1.1 (DOK 2)

2. Learning Goal
The students will use strategies for adding numbers within 100.

3. Objective
Students will be able to 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.

4. Scale
3- I can, with no help, use addition and subtraction within 100 to solve one- and two-step word problems.
2- I can, with limited help, use addition and subtraction within 100 to solve one- and two-step word problems.
1- I need a lot of help to use addition and subtraction within 100 to solve one- and two-step word problems.
0- I can’t, even with help, use addition and subtraction within 100 to solve one- and two-step word problems.

5. Solve & Share pg 171
There are 23 red balloons in a bag. There are 38 blue balloons in the same bag. How many balloons are in the bag?
Use a tool to solve the problem. Be ready to explain which tool you used and why.

6. H.O.T. to consider during the lesson
1. Use context clues to identify which order of operation you would use to create an equation for the word problem.
 2. Summarize how you used the CUBES strategy to create an equation and solve the word problem. (Create Flow Chart of steps)

7. Let’s review the strategy.

8. Turn to page 172 Follow along as I read the Visual Learning Bridge.
Let’s look at problem 1 and solve the problem using a tool. Explain why you chose that tool.
1. There are 16 chickens in the yard. There are 19 chickens in the barn. How many chickens are there in all?
Will you use place value blocks or counters to solve the problem? Explain.
1. Use context clues to identify which order of operation you would use to create an equation for the word problem.
 2. Summarize how you used the CUBES strategy to create an equation and solve the word problem. (Create Flow Chart of steps)

9. Objective reminder
Students will be able to 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.

10. Kagan Structure- Think, Pair, Share
Students will count 1- 2
Students 1 will partner with Students 2
Students 1 solve question 3 and 5.
Students 2 solve question 4 and 6.
Use accountable talk while talking with your partner. Listen to what they say to be able to retell if called on.

11. You do
Work questions 7 and 8 by yourself.

12. Exit Ticket- write in journal
Use questions 7 and 8 to answer H.O.T.S
1. Use context clues to identify which order of operation you would use to create an equation for the word problem.
 2. Summarize how you used the CUBES strategy to create an equation and solve the word problem. (Create Flow Chart of steps)

13. Rate yourself in your journal and explain why you are that rating
3- I can, with no help, use addition and subtraction within 100 to solve one- and two-step word problems.
2- I can, with limited help, use addition and subtraction within 100 to solve one- and two-step word problems.
1- I need a lot of help to use addition and subtraction within 100 to solve one- and two-step word problems.
0- I can’t, even with help, use addition and subtraction within 100 to solve one- and two-step word problems.