Lesson 1

All Sorts of Buttons

Est. Class Sessions: 2
X

Mathematical Standards

2.NBT.A
Understand place value. (2.NBT.A.1)
2.G.A.
Reason with shapes and their attributes. (2.G.A.1)

Standards for Mathematical Practice

MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students group and classify buttons with a variety of characteristics. The lesson begins with the book The Button Box by Margarette S. Reid, a story about a child who examines the many different buttons in Grandma’s button box. Student pairs estimate the number of buttons in a collection. Through a discussion, students create a list of characteristics by which to sort a bag of buttons. Then they choose a sorting method, sort buttons, and record the results in a drawing.

Content in this Lesson

  • Using efficient grouping strategies to count a collection of objects [E3].
  • Using a benchmark to estimate a quantity of objects in a collection [E4].
  • Sorting and classifying objects by their characteristics [E8].
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

clear plastic bag with an assortment of about 50 buttons. See Materials Preparation.

Materials for the Teacher

Display of All Sorts of Buttons (Student Activity Book) Pages 67–68
class number line (0–130) or prepared Number Line Display Masters (Teacher Guide) Pages 55–58
Unit 2 Assessment Record
Math Facts Class Record
referent bags with exactly 20 buttons, 50 buttons, and 80 buttons. See Materials Preparation.
clear plastic bag with a handful of buttons (about 50 buttons)
The Button Box by Margarette S. Reid

Materials Preparation

Prepare Number Line Display. Display a number line where it is easily accessible by both you and the students. Students should be able to see it and touch it with at least a pointer. Use the class number line (0–130) or prepare the Number Line Display Masters. This version can be assembled, laminated, and displayed on the board or on a bulletin board. It is also small enough that it could be moved when it is not needed.

Prepare Bags of Buttons. Place one handful of buttons (about 50) in a clear plastic bag for each student pair and one extra for the whole-class demonstration in Part 2. These bags of buttons will also be used in Lesson 2.

Prepare Referent Bags of Buttons. Place exactly 20, 50, and 80 buttons in small bags. Label and hang the bags above the class number line as shown in Figure 1. Students will use these as benchmarks to estimate the number of buttons. Leave the referent bags on display for Lesson 2.

Triangle Flash Cards. Prepare copies of the Triangle Flash Cards on heavier paper or card stock. Have students cut apart each set and store them in an envelope. You may want to provide each student with two sets, one to use at school and one to take home.

Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED
All Sorts of Buttons
Student Activity Book
Pages 67–68
E3.
Use efficient grouping strategies to count a collection of objects.
E4.
Use a benchmark to estimate a quantity of objects in a collection.
E8.
Sort and classify objects by their characteristics.
How Would You Sort Them
Student Activity Book
Page 69
E8.
Sort and classify objects by their characteristics.
DPP Item A
Addition Flash Cards:
Group C
Teacher Guide - digital
E11.
Demonstrate fluency with the addition facts with sums to ten in Group C
(1 + 9, 2 + 7, 2 + 8, 3 + 6, 3 + 7, 4 + 6, 5 + 5).

Vocabulary in this Lesson