Reflection: Modeling Partial Products Part 1 - Section 3: Student Practice

 

During student practice time, I conferenced with this student (Multiplying by 9000) about 9000 x 5. At first, I struggled with explaining how to multiply 9000 x 5 without telling the student, "9 x 5 is 45 and then add on three zeros." 

That was when I thought of a more effective way of modeling this on the board for all students. 

1. At first I began Modeling: Adding on Zeros. I showed students that 45 + 000 = 45. 

2. Then, I went on to Modeling 9000 x 5 on the Board. I showed students how to change 9000 x 5 into 9 x 1000 x 4. We multiplied the 9 x 5 to get 45 and then multiplied the 45 by 1000 to get 45,000. 

After this modeling, I conferenced with the student again to Check for Understanding.

 

  Modeling: More Effective Way of Modeling
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Partial Products Part 1

Unit 11: Multiplication: Single-Digit x Multi-Digit
Lesson 3 of 8

Objective: SWBAT solve 1-digit x 4-digit multiplication problems using the partial product method and the standard algorithm.

Big Idea: Students should be able to solve and illustrate multiplication problems using multiple strategies.

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Subject(s):
Math, Number Sense and Operations, multiplication, partial products
  100 minutes
finding partial products
 
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