Lesson 2

Handful of Buttons

Est. Class Sessions: 2
X

Mathematical Standards

2.NBT.A
Understand place value. (2.NBT.A.1, 2.NBT.A.3, 2.NBT.A.4)
2.MD.D
Represent and interpret data. (2.MD.D.10)

Standards for Mathematical Practice

MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP7.
Look for and make use of structure.

Students demonstrate their estimation and number sense skills. They estimate the number of buttons in their handful, group them to make counting easier, and skip count to find the total. They sort a handful of buttons, draw a picture of the sorted groups, and count the buttons according to the groupings. Students then make a class data table and a graph. The class analyzes the results, draws conclusions, and makes predictions based on the results.

Content in this Lesson

  • Representing and identifying quantities using groups of counters and
    drawings [E1].
  • Using efficient grouping strategies to count a collection of objects [E3].
  • Using a benchmark to estimate a quantity of objects in a collection [E4].
  • Using words to show comparisons of quantities [E5].
  • Collecting and organizing data in a table and bar graph [E9].
  • Using a table or bar graph to solve problems about a data set. [E10].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

1 self-adhesive note (112 x 2 inches)
desk number line (0–100)
half of a sheet of paper folded in half

Supplies for Student Pairs

clear plastic bag with an assortment of buttons (about 2 handfuls or 70–80 buttons)

Materials for the Teacher

Display of Estimate, Group, and Count (Student Activity Book) Page 71
Display of Handful of Buttons (Student Activity Book) Page 73
Display of Handful of Buttons Graph Master (Teacher Guide)
Unit 2 Assessment Record
class number line (0–130) or the prepared Number Line Display Master from Lesson 1
clear plastic bag with 70–80 buttons
referent bags of buttons (20, 50, and 80) from Lesson 1
chart paper, optional. See Materials Preparation.

Materials Preparation

Prepare to Display Class Number Line. Display the class number line (0–130) or use the Number Line Display Masters to make a display of a number line to demonstrate skip counting and intervals. This needs to be displayed in a location easily viewed by all students.

Prepare Bags of Buttons. Use the bags of buttons from the previous lesson. Add another handful of buttons to each bag so they have 70–80 buttons.

Prepare Display of Graph. Prepare a large display of the Handful of Buttons Graph Master in the Teacher Guide. If the graph is made on chart paper, make sure there is adequate space to display the self-adhesive notes (112 x 2 inches) on the graph.

Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED
Groups of Buttons
Student Activity Book
Pages 75–76
E1.
Represent and identify quantities (e.g., greater than 100) using groups of counters, drawings, symbols, number sentences, and words.
E3.
Use efficient grouping strategies to count a collection of objects.
E4.
Use a benchmark to estimate a quantity of objects in a collection.
Observe the
Write Problems about the Data section
Teacher Guide - digital
E10.
Read a table or bar graph to solve problems about a data set.