Lesson Overview (cont.)
The question we want to answer is: What is the total number of apples in all? We need to add to find the number in all, or the total. On the board, write the following answer stem: “Campers pick ____ apples in all.”
MULTILINGUAL LEARNERS Review the definitions of fl ats , rods , and units . Help campers notice that each block has a different value. Provide a sentence frame to help campers explain how to use each block: ____ blocks help me solve addition problems by ____.
Have campers discuss how they might find the total number of apples. Listen in for different strategies for solving. Ask pairs of campers to share their strategies. Potential strategies might include using base-ten blocks on place-value mats, using drawings on place-value mats, and using drawings on paper. Invite campers to turn and talk about how they might represent the number of hundreds, tens, and ones with base-ten blocks or in a drawing. Then have them use their strategies to solve the problem. Ask campers to explain their findings and model each of the strategies. Have them tell how many ones they get when they add 104 and 18. Listen for the need to regroup, or compose, a 10 because there are 12 ones. Review the two Words of the Day, regroup and place value , and explain—or ask campers to explain—the definition of each. Model regrouping 10 ones as one 10 on a place-value mat. Continue by asking about the number of tens and hundreds. Then, have campers fill in the answer on their worksheet. Integrate Guide campers to Problem 2 on Worksheet 2. Read the problem aloud. Invite campers to turn and talk about how to find the total number of berries. Camper suggestions may include using base-ten blocks or making simple drawings of flats, rods, and units on a place-value mat. Campers, how can we show regrouping, or composing, a 10 in a drawing ? Monitor discussion. Encourage pairs to share strategies, such as crossing out or erasing, 10 units and drawing another tens rod; or circling 10 ones and drawing an arrow to the tens place. Then ask campers to solve the problem and fill in the answer on Worksheet 2. Check for Understanding Review these questions with campers to land on the key points of the lesson. • How many total berries did the campers pick? • How did you find the total number of berries? • What strategy can you use to find the total, or number in all? • How can composing a ten from 10 unit cubes help you add to find a total?
Integrate
This exercise provides opportunities to integrate concepts into an additional problem or two.
Check for Understanding After campers discuss their strategies and complete an activity
sheet problem, the leader reviews the Math Power lesson with a Check for Understanding to confirm that all campers understand the lesson.
Lesson 8 Unit: Kindness | 71
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