Multiplication with 2-Digit Numbers
Jan. 16-20, 2016

Unit Overview      Week 1        Week 2        Week 3        Week 4        Week 5      Week 6      Week 7


Week 1:  Strategies for Multiplication
Dec. 12 - 16, 2016

Curriculum Resources:
Investigations Unit 3 Session 4.1 Doubles and Halves
Investigations Unit 3 Session 4.2 Multiplication Cluster Problems
Investigations Unit 3 Session 4.3 Strategies for Multiplication
Investigations Unit 3 Session 4.4 Strategies for Multiplication
Investigations Unit 3 Session 4.5 End-of-Unit Assessment 
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CA Common Core Standards:  Number and Operations in Base Ten

Copy and paste from CC Website:  http://www.corestandards.org/Math/
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Engaging Lesson & Notes

Lesson 1
Source
Investigations, TE p. 124
Investigations Student Activity Book, pp 52-56
Math Expressions, TE p. 124

Lesson
Session 4.1  Doubles and Halves
Students will examine how halving one factor and doubling the other in a multiplication expression results in an equivalent expression: 28 x 6 = 168, then 14 x 12 = 168

Math Focus Points
  • Determining the effect on the product when the factor is doubled and halved.
  • Representing a multiplication or division problem with pictures, diagrams, or models.

Number Talk
13 x 2 =                              
13 x 4 =
13 x 8 =

13 x 16=

What pattern do you see?
What is the relationship between these problems?

Teaching Tips:
Be sure to look at the differentiation on P. 127 of the Investigations lesson.  Leveled problems are offered.

Challenge: (for students who need more rigor)
Missing Number Challenge
?  x ?   = 612
What might the missing numbers be?
How many solutions can you find?
How do you know you have found all the different solutions?

​Practice  
Student Activity Book pg. 55-54

Formative Assessment
Exit Slip:  Solve 4 x 24 and 8 x 12...How are these problems related?

​Homework
Investigations Student Activity Book, pg. 56

​Materials

Supplemental Lessons and Activities

Comments, Photos, Videos . . .

Note 12 x 15 number talk as an example of doubling and halving.
Watch student video:
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Engaging Lesson & Notes

Lesson 2

Source
Investigations, TE pg. 129 and 136
Investigations Student Activity Book, pp 51-60
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Lesson
Session 4.2 Multiplication Cluster Problems
Session 4.3 Strategies for Multiplication

Math Focus Points
  • Developing strategies for multiplying that involved breaking apart numbers
  • Using arrays to model multiplication
  • Determine the effect on the product when a factor is doubled and halved

Number Talk
Use the Discussion #1 on pg 17, TE
16 x 3 =
16 x 6 =
Look at these two problems.  How are they related to each other?  How are the two answers related? 
(Note: If no one offers the array model, introduce the idea yourself by drawing an unmarked array of 16 x 3 and followed by a divided array 16 x 6.

Teaching Tips:
We are recommending to combine Sessions 4.2 and 4.3 as they both work with patterns in multiplication.

​Practice
Play Greatest Product Wins Game
Investigations Student Activity Book, pg 59 (4.2)
Investigations Student Activity Book, pg 62 (4.3)

​Formative Assessment
Exit Slip:  Solve for 18 x 2 and 18 x 4.  How are these equations related? What do you notice?  How do you know?

​Homework
Investigations Student Activity Book, pg 60 (4.2)
Investigations Student Activity Book, pg 64 (4.3)

​Materials
Recording Sheet for Greatest Product Wins

Supplemental Lessons and Activities

Play Greatest Product Wins
greatest_product_wins.docx
File Size: 30 kb
File Type: docx
Download File

Comments, Photos, Videos . . .

Engaging Lesson & Notes

Lesson 3

Source
Investigations, TE pg. 144
​Student Activity Book p. 57,58,61-62, 65

Lesson Title
Session 4.4 Strategies for Multiplication, continued

Math Focus Points
  • Determining the effect on the product when a factor is doubled or halved
  • Developing strategies for multiplying that involve breaking apart numbers

​Number Talk
Continue the Discussion of ungrouping...

16 x ___= 48
16 x ___ = 96
Look at these two problems.  What factors are missing? How are they related to each other?  How are the two answers related? 

​Practice
Play Small Array/Big Array or Missin Factor
Investigations Student Activity Book, pg 63 (4.3)
Investigations Student Activity Book, pg 64 (4.3)

Formative Assessment
Collect student data through an exit ticket... 2 (28 x 5)
​Ask students about what strategies can they use to break apart the numbers 2(28x5).

​Homework
SAB 64. 7 x 34.
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​Materials
Small array/Big Array Cards and Recording sheet.

Supplemental Lessons and Activities

Comments, Photos, Videos . . .

Engaging Lesson & Notes


Lesson 4
Source
Investigations, TE pg. 144-147
​Student Activity Book p. 57,58,61-62, 65
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Lesson Title
Session 4.5 End-of-the Unit Assessment Prep
 
Math Focus Points
*Solving division problems by making groups of the divisor
*Using known multiplication combinations to solve division problems
*Developing strategies for multiplying that involves breaking apart numbers.
 
​Number Talk
write the number 130 on the board.
Ask and students to think of all the paossible factor pairs for the number. 
Make a list of all combinations
Formative Assessment
Student activity book p. 65

​Practice
​Play Small Array/Big Array or Missin Factor
Investigations Student Activity Book, pg 65 (4.4)
Investigations Student Activity Book, pg 64 (4.3)
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​Homework
Continue on breaking numbers apart. Review pae 65.
​Materials
Student activity book pages 61-62 and 65.
Small array/Big Array Cards and Recording sheet.

Supplemental Lessons and Activities

Comments, Photos, Videos . . .

Engaging Lesson & Notes

Lesson 5
Source
Investigations, TE p. 148-150
Student Activity Book, pg 66
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Lesson Title
Continue...End of the Unit Assessment

 Lesson Description
developing strateies for multiplication and division by the use of our of he five benchmarks descibed in unit 4.
Math Focus Points
*Solving division problems by making groups of the divisor
*Using known multiplication combinations to solve division problems
*Developing strategies for multiplying that involves breaking apart numbers.

Number Talk

​Formative Assessment
Students will work individually on the End of the Unit Assesmen pages:
M51 and M52​
​Practice

​Materials
List materials and then drag file elements below for uploading the actual files as needed.

Supplemental Lessons and Activities

Comments, Photos, Videos . . .