Could Be or Crazy
Est. Class Sessions: 1
Students use their growing understanding of numbers to 100 to make estimates and measurements in nonstandard units (links) and standard units (inches). They evaluate the reasonableness of their estimates and learn to recognize that the measure of a length is dependent on the size of the unit of measure.
Content in this Lesson
- Recognizing that the measure of a length is dependent on the size of the unit of measure (e.g., a pencil is 4 large paper clips or 6 small paper clips) [E9].
- Estimating length in nonstandard (links) and standard (inches) units [E11].
- Distinguishing between a reasonable estimate and an unreasonable
one [MPE3]. - Measuring length in links and inches.
- Developing number sense for two-digit numbers.
- Showing work [MPE5].
- Using labels to show what numbers mean [MPE6].
Materials for Students
| Daily Practice and Problems | Lesson | Homework | Assessment | ||
|---|---|---|---|---|---|
Student Books |
Student Activity Book |
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Teacher Resources |
Teacher Guide - digital |
|
Supplies for Students
10-link chain
desk number line (0–40)
Materials for the Teacher
Display of Measuring with Links and Inches (StudentActivity Book) Page 343
Display of Math Practices (Student Activity Book) Reference
Display ruler from 10-Inch Ruler Master (Teacher Guide)
Unit 11 Assessment Record
100-link chain, each ten a different color
10-link chain
chart paper
class number line (0–130)
Materials Preparation
Prepare a 100-Link Chain. Make a 100-link chain using different colors for each ten. Display it in the classroom where students can easily see its full length.
Prepare 10-Link Chains. Make one 10-link chain for each student. All the links in one 10-link chain should be the same color. However, the colors of the 10-link chains can differ from student to student.
Prepare 10-Inch Rulers. Make one copy of the 10-Inch Ruler Master for each student. Cut out the ruler. This modified ruler is used in the lesson because it is easier for students to add groups of 10 inches than groups of 12 inches.
Make a List of Classroom Items to Measure. Prepare
a list on chart paper of classroom items to be measured.
Examples of items are given in Figure 1. The
items should have a length that can be measured of
between
30 to 100 inches.
Figure 1: Sample list of classroom items to measure
Assessment in this Lesson
| Assessment | Expectation Assessed | Math Practices Expectation Assessed |
|---|---|---|
| Ana's Estimates Student Activity Book Page 345 |
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| DPP Item P Nickels and Dimes Teacher Guide - digital |
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