Multiplication and Division
Week 6
Week 6
Investigations CC Supplemental Lessons

THE WEEK ATAGLANCE (5 Days)
 Investigations, Unit 5, Investigation Session 3.3  Finding the Number of Squares in an Array
 Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
 Lesson: Investigations Unit 5, Session 3.4  Array Games, Part 1  Play Factor Pairs (Combinations I Know/Combinations I Don't Know)
 Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
 Lesson: Investigations Unit 5, Session 3.5  Learning Multiplication Combinations
Day 1
Number Talk Choices (pg 210 in Number Talks Book)
300269, 300249, 30099, 300149
Lesson: Investigations, Unit 5, Investigation Session 3.3  Finding the Number of Squares in an Array
Focus on ways to count arrays and ways to split arrays to strategically find the number of squares.
**Have students check array cards and make sure they are accurate and done well.**
With extra time  have them pull out the 1's, 5's, and 10's  put in a separate baggie  play array war.
Materials:
Chart paper
Arranging Chairs materials See Session 3.1.
Making Array Cards materials See Session 3.2.
Chart paper Write a list of the numbers up to 50 not yet on display.
Number Talk Choices (pg 210 in Number Talks Book)
300269, 300249, 30099, 300149
Lesson: Investigations, Unit 5, Investigation Session 3.3  Finding the Number of Squares in an Array
Focus on ways to count arrays and ways to split arrays to strategically find the number of squares.
**Have students check array cards and make sure they are accurate and done well.**
With extra time  have them pull out the 1's, 5's, and 10's  put in a separate baggie  play array war.
Materials:
Chart paper
Arranging Chairs materials See Session 3.1.
Making Array Cards materials See Session 3.2.
Chart paper Write a list of the numbers up to 50 not yet on display.
Day 2
(Prior to this day, students have made the array cards from Investigations, Unit 5, Investigation 3.2 and 3.3)
Number Talk Choices (pg 210 in Number Talks Book)
400349, 400299, 400274, 200199
Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
Lesson: Investigations Unit 5, Session 3.4  Array Games, Part 1  Play Factor Pairs (Combinations I Know/Combinations I Don't Know) *Have students pull out the 1's, 5's, and 10's array cards. Those are the factors (card sets) they will work with this week.*
Resources Masters:
M26, English Factor Pairs Spanish: R26 Read the rules in advance Make copies. (as needed)
M27, English “Combinations I Know” and “Combinations I’m Working On” Spanish: R27 Make copies. (as needed)
Array Cards (1 set per pair)  made in previous lessons
Workshop Choices
(Prior to this day, students have made the array cards from Investigations, Unit 5, Investigation 3.2 and 3.3)
Number Talk Choices (pg 210 in Number Talks Book)
400349, 400299, 400274, 200199
Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
 Finding Patterns and Verbally Describing: Using a 100 chart, students color in multiples of 5 then circle multiples of 10 on the same chart. They notice patterns and verbally describe what they notice. Focus on precise description of the patterns they see. For example, "Multiples of of 5 all end in 5 or 0." Tomorrow they will write about these patterns.
 You could also have students write out each factor pair with its matching equivalent repeated addition and product. (see Math Expressions Unit 1). Notice patterns. (2 x 5 = 5 + 5 = 10)
Lesson: Investigations Unit 5, Session 3.4  Array Games, Part 1  Play Factor Pairs (Combinations I Know/Combinations I Don't Know) *Have students pull out the 1's, 5's, and 10's array cards. Those are the factors (card sets) they will work with this week.*
 Using arrays to find a product by skip counting by one of its dimensions
 Identifying and learning multiplication combinations not yet known
 Using known multiplication combinations to determine the product of more difficult combinations
Resources Masters:
M26, English Factor Pairs Spanish: R26 Read the rules in advance Make copies. (as needed)
M27, English “Combinations I Know” and “Combinations I’m Working On” Spanish: R27 Make copies. (as needed)
Array Cards (1 set per pair)  made in previous lessons
Workshop Choices
 Circles and Stars (War)
 Factor Pairs  Combinations I Know/Am Working On
 Array War
 Multiple Patterns
 Which Has More?
Day 3
Number Talk (pg 210) 500449, 500419, 500299, 500249 Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
Lesson: How Long, How Many (from Introducing Multiplication, p.77) Workshop:


Day 4
Number Talk (pg 210)
750709, 750599, 750449,750324
Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
Number Talk (pg 210)
750709, 750599, 750449,750324
Multiples Exploration: (For ideas see Investigations Unit 5, Inv. 2, Sessions 2.1 and 2.2)
 Sharing what you found in multiples pattern: Students take their shaded 100s charts and the written descriptions of patterns . . . to music, they walk around and stop when the music stops. They share what they noticed. Call on a few students to share out what their partners said.
 Circles and Stars (War)
 Multiple Arrays  Math Expressions, On Level Activity Card, 13 (triangle)
 Factor Pairs
 Array War
 Doubling Pot Problems
 Which Has More (continued)
Day 5
Number Talk (pg 211)
5029, 5529, 5548, 5537
Lesson: Investigations Unit 5, Session 3.5  Learning Multiplication Combinations
Materials:
M28–M33, English Multiplication Cards Spanish: R2833 Make copies. (1 set per student)
M34–M35, English Practicing with Multiplication Cards Spanish: R3435 Make copies. (1 per student)
M37–M38, English Family Letter Spanish: R3738 Make copies. (1 per student)
Array Cards (1 set per pair)
Envelopes or resealable plastic bags (1 per student)
Paper clips (1 per student)
Scissors (1 per student)
Chart paper Divide the chart paper into two columns and label them “Combinations We’re Working On” and “Start With.”
Workshop:
Number Talk (pg 211)
5029, 5529, 5548, 5537
Lesson: Investigations Unit 5, Session 3.5  Learning Multiplication Combinations
Materials:
M28–M33, English Multiplication Cards Spanish: R2833 Make copies. (1 set per student)
M34–M35, English Practicing with Multiplication Cards Spanish: R3435 Make copies. (1 per student)
M37–M38, English Family Letter Spanish: R3738 Make copies. (1 per student)
Array Cards (1 set per pair)
Envelopes or resealable plastic bags (1 per student)
Paper clips (1 per student)
Scissors (1 per student)
Chart paper Divide the chart paper into two columns and label them “Combinations We’re Working On” and “Start With.”
Workshop:
 Circles and Stars (War)
 Multiple Arrays  Math Expressions, On Level Activity Card, 13 (triangle)
 Factor Pairs
 Count and Compare Arrays (Array War)
 Doubling Pot Problems
 Which Has More (continued)