Solving Multistep Word Problems Using Manipulatives SUBJECT: Multistep Word Problems (mult. & div.) DURING BEFORE TEACHERS: Gwen Walton STANDARD: 4.OA.3 Solve multistep word problems posed with whole numbers and having whole number answers using the four operations. OBJECTIVE (EXPLICIT): I can develop and implement a strategy for solving a multistep word problem. I can use a variety of strategies to solve division problems. I can explain my reasoning when solving a multistep word problem. EVIDENCE OF MASTERY (MEASURABLE): Completed Problem Set SUB-OBJECTIVES, SWBAT (SEQUENCED FROM BASIC TO COMPLEX): KEY VOCABULARY: MATERIALS: (per group) Base Ten Blocks (20 units and 15 rods), Colored Tiles (150), Unifix Cubes (150), Cuisenaire Rods, paper, pencil ENGAGE (MAKE CONTENT AND LEARNING RELEVANT TO REAL LIFE AND CONNECT TO STUDENT INTEREST) “If I had 10 pieces of gum to share equally with my friend, how many pieces would we each get?”, “How do you know?” TEACHER WILL: STUDENT WILL: Provide materials to groups. Participate in discussion. Review understanding of multiplication and division up to this point (equal groups, equal shares) Set expectations for group work (use manipulatives, draw/write explanations, all group members participate). CO-TEACHING STRATEGY IF APPLICABLE TEACHER WILL: STUDENT WILL: Pass out problem sets. The students should be devising their own approaches to solve the As you circulate, focus on which problems. strategies the students are using. Use manipulatives of their choice Determine which students you will from those available. ask to share. Remember that your goal is to help students develop Once a problem is solved, they need effective strategies; this is not a time to draw and write an explanation. to study the standard algorithm. CO-TEACHING STRATEGY IF APPLICABLE AFTER TEACHER WILL: STUDENT WILL: When most students have finished Share their strategies with the class the problems, invite several to share and a neighbor. their strategies. Try to examine every type of strategy used in the room. At this point do not share the standard algorithm. To close the lesson, ask students to think about their favorite strategy from today. The students could discuss this strategy and why they like it with a partner or they could write their response in a journal. CO-TEACHING STRATEGY IF APPLICABLE Sharing Procedure 1. Display the student’s strategy. You may use a document camera or have the student copy their work onto the board. 2. Ask the student to explain their reasoning for each step. 3. Ask questions to determine the student’s level of understanding, “Why did you…” 4. Allow the class to ask the student questions about the strategy. 5. To ensure others are listening, have each student explain the strategy to a neighbor. 6. Make any clarifying statements about the strategy. 7. Invite a new student to share a different strategy. Questions to Pose: • Why did you…? • How is Sara’s strategy similar to Michael’s? How are they different? • Where did you run into difficulty in your work? Why was it problematic? • Why is it important that your strategies are accurate and efficient? • Which strategy is most efficient? Which strategy is least efficient? Possible Student Example: There are 52 students in each lunch period. The students are divided evenly between 4 tables. How many students eat at each table? First I took out 5 rods and 2 units to show 52. I made 4 groups Multistep Problem Set with 1 rod in each. Then I traded my 5th rod in for 10 units, which gave me 12 units. Then I took my my 12 units and gave 3 to each of the 4 groups. So, each table haas 13 students. Directions: Use your manipulatives to solve each problem. Then draw and write an explanation for each solution. There are 52 students in each lunch period. The students are divided evenly between 4 tables. How many students eat at each table? There are 65 students sitting at 5 tables. There is a tray of cookies at each table, with 2 cookies for each student at the table. How many cookies are on each tray? Mrs. Jones has 30 students. She wants to give each of them 4 pencils. Pencils are sold in packages of 12. How many packages will she need? I have 112 downloaded songs. Each song is about 3 minutes long. If they are divided into 4 equal playlists, about how long is each playlist (in minutes)?