Lesson 3

Sharing Cookies

Est. Class Sessions: 2
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Mathematical Standards

1.NBT.A
Extend the counting sequence. (1.NBT.A.1)
1.NBT.B
Understand place value. (1.NBT.B.2)
1.OA.C
Add and subtract within 20. (1.OA.C.5, 1.OA.C.6)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in
solving them.
MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP6.
Attend to precision.

Students listen to the story The Doorbell Rang by Pat Hutchins and explore the concept of division by partitioning numbers into fair shares with and without leftovers.

Content in this Lesson

  • Reading and writing numbers to 20 [E3].
  • Representing and identifying quantities using counters and pictures [E4].
  • Connecting representations of quantities using counters, pictures, and
    symbols [E5].
  • Dividing a collection of objects into groups of a given size and counting the leftovers [E6].
  • Composing and decomposing numbers to 20.
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

20 connecting cubes or other counters
12 small paper plates

Materials for the Teacher

Display of second page of Sharing 12 Cookies (Student Activity Book) Page 98
Display of first and second pages of Fair Shares (Student Activity Book) Pages 99–100
Unit 5 Assessment Record
The Doorbell Rang by Pat Hutchins
12 props for cookies (counters, paper cookies, small cookies). See Materials Preparation.
12 small paper plates. See Materials Preparation.
two containers with labels “Number of People” and “Number of Cookies,” optional. See Materials Preparation.
slips of paper with one number between 2 and 6 and one between 12 and 20 on each, optional. See Materials Preparation.

Materials Preparation

Prepare for The Doorbell Rang Activity. Have a copy of the book The Doorbell Rang available to read at the beginning of the lesson. To have students act out the book, set aside 12 paper plates and 12 cookie props to represent the cookies in the story.

Prepare Learning Center for Targeted Practice. Place extra copies of the first page of Fair Shares from the Student Activity Book and 20 counters in a learning center. Have two containers with the labels “Number of People” and “Number of Cookies.” In the “Number of People” container, place individual pieces of paper with numbers between two and six. In the “Number of Cookies” container, place individual pieces of paper with numbers between twelve and twenty.

Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED MATH PRACTICES EXPECTATION ASSESSED
Fair Shares
Check-In: Question 3
with Feedback Box
Student Activity Book
Pages 101–102
E3.
Read and write numbers to 50.
E4.
Represent and identify quantities using counters, coins, number lines, ten frames, 100 Charts, pictures, data tables, and graphs.
E5.
Connect representations of quantities (e.g., number lines, coins, counters, pictures, symbols, ten frames, data tables, graphs).
E6.
Divide a collection of objects into groups of a given size including groups of tens and count the leftovers.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.
MPE6.
Use Labels. I use labels to show what numbers mean.
DPP Item I
Pennies and Nickels
Teacher Guide - digital
E2.
Skip count by fives and count on to find the value of a set of coins.

Vocabulary in this Lesson