Lesson 1

Reading Scales

Est. Class Sessions: 1–2
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Mathematical Standards

2.NBT.A
Understand place value. (2.NBT.A.2)
2.OA.C
Work with equal groups of objects to gain foundations for multiplication. (2.OA.C.3)

Standards for Mathematical Practice

MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students examine and discuss various types of scales. They use skip counting and counting on to interpret scales.

Content in this Lesson

  • Reading and interpreting a variety of scales (e.g. graduated cylinder, thermometer) calibrated by twos, fives, and tens [E4].
  • Using labels to show what numbers mean [MPE6].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital
  • DPP Item A
    Triangle Flash Cards: Group C Subtraction Facts

Supplies for Student Pairs

crayon or colored marker

Materials for the Teacher

Display of Thermometer Master (Teacher Guide)
Display of Speedometer Master (Teacher Guide)
Display of Graduated Cylinder Master (Teacher Guide)
Display of Scale 1 with Blowup Master (Teacher Guide)
Display of Scale 2 with Blowup Master (Teacher Guide)
Display of Scale 3 with Blowup Master (Teacher Guide)
Display of Scales (Student Activity Book) Pages 551–552
Unit 11 Assessment Record
Math Facts Class Record
measuring tools with varying scales, at least 1 for each group. See Materials Preparation.
chart paper

Materials Preparation

Prepare Triangle Flash Cards. Prepare copies of the Triangle Flash Cards on heavier paper or card stock for each student. Have students cut apart each set and store them in an envelope or plastic bag. Provide each student with two sets, one to use at school and one to take home. Students will need these cards on an ongoing basis.

Gather Measuring Tools. Gather a variety of measuring tools displaying varying types of scales or dials. Provide at least one tool for each group of 2–4 students. Suggestions include: timer, analog clock, bathroom scale, graduated cylinder, measuring tape, radio tuner, kitchen scale, measuring cup, thermometer, ruler, meterstick, yardstick.

Prepare Tools with Scales Chart. Use chart paper to create a three-column chart of measuring tools that display a scale. See in Figure 1.

image

Figure 1: Tools with a Scale chart

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed
Understanding Scales
Student Activity Book
Pages 555–556
E4. 
Read and interpret a variety of scales (e.g., graduated cylinder, thermometer) calibrated by twos, fives, and tens.
MPE6. 
Use labels. I use labels to show what numbers mean.
DPP Item A
Triangle Flash Cards: Group C Subtraction Facts
Teacher Guide - digital
E9. 
Demonstrate fluency with the subtraction facts related to the addition facts in Group C (9 − 2, 9 − 3, 9 − 6, 9 − 7, 10 − 1, 10 − 2, 10 − 3, 10 − 4, 10 − 5, 10 − 6, 10 − 7, 10 − 8, 10 − 9, 11 − 2, 11 − 3, 11 − 4, 11 − 5, 11 − 6, 11 − 7, 11 − 8, 11 − 9).