Lesson Objective

Understand “equal groups of” as multiplication.

Fluency Practice• Group Counting• Count forward and backward to 20• Whisper• Hum• Think• Count by twos

Application Problem

There are 83 girls and 76 boys in the third grade. How many total students are in the third grade?

ReadDrawWrite

Concept Development

Problem 1• Materials:• 12 counters per student• Personal whiteboards

• Skip-count to find the total number of objects

2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 2010 twos10 groups of two is 20

Concept Development

Problem 2• Understand how repeated addition,

counting groups in unit form, and multiplication equations are alike.

2 + 2 + 2 + 2 + 2 + 2= 126 twos = 126 x 2 = 12

Concept Development

Problem 3• Write multiplication sentences from equal

groups.

4 + 4 = 8 or2 x 4 = 8 or4 x 2 = 8

Concept Development• Look at the picture and the multiplication

sentence. Check my work by writing an addition sentence and counting to find the total number of objects.

3 x 4 = 12

Problem Set• You have 10 minutes to complete the

worksheet.

Student Debrief• On the first page, what did you notice about the

answers to your problems?• In Problem 2, how would you change the picture to

show equal groups?• Discuss the relationship between repeated addition

and the unit form – 2 groups of three or 3 groups of two, depending on the drawing.

• Discuss the relationship between repeated addition, counting groups in unit form, and multiplication sentence 3 x 2 = 6.

• Review the new vocabulary, including efficient, number sentences, and equations.

Review Lesson Objective

Understand “equal groups of” as multiplication.

Exit Ticket• You have 3 minutes to complete the

worksheet.

• You will have additional practice for homework.