Lesson 2

Measure with Links

Est. Class Sessions: 1–2
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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.NBT.B.3)
1.OA.C
Add and subtract within 20. (1.OA.C.5, 1.OA.C.6)
1.MD.A
Measure lengths indirectly and by iterating length units. (1.MD.A.1, 1.MD.A.2)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in
solving them.
MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.

Students skip count by fives using chains of connecting links to measure and record the lengths of various objects.

Content in this Lesson

  • Representing and identifying quantities using connecting links [E1].
  • Skip counting by fives and tens [E3].
  • Comparing and ordering lengths using comparative language: shorter, longer, shortest, longest [E5].
  • Measuring and estimating length using nonstandard units (e.g., connecting links) [E9].
  • Using labels to identify units of measure [MPE6].

Daily Practice and Problems E–F

E. Add It Up

F. Sharing Counters

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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

45 connecting links

Materials for the Teacher

Display of the Math Practices (Student Activity Book) Reference
Unit 7 Assessment Record
chain of 45 connecting links. See Materials Preparation.
chart paper
class number line (0–130)

Materials Preparation

Highlight Fives and Tens on Classroom Number Line. Make sure that the fives and tens on the class number line are still highlighted from work in Unit 5 Lesson 2. If they are not, highlight multiples of five and ten on the classroom number line. Use two different colors of self-adhesive notes; place one color above the multiples of five and the other color above or below the multiples of ten. Multiples of 10 will have two adhesive notes since they are multiples of both 5 and 10. Leave the adhesive notes on the classroom number line for use in later units.

Chain of Connecting Links. Build a chain of 45 links to use for demonstration. Organize the links by grouping five of the same color, then alternate colors. See Figure 1.


Figure 1: Group links by fives

Prepare Optional Targeted Practice. In a center, place connecting links and an assortment of objects to provide targeted practice with measuring length using nonstandard units similar to DPP item K Find an Object: Links and item L Find Two Objects: Links.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices
Expectation Assessed
Measuring Our World
Check-In: Questions 4–9
with Feedback Box
Student Activity Book
Pages
174–176
E1.
Represent and identify quantities using connecting links, coins, and symbols.
E5.
Compare and order quantities (e.g., lengths using comparative language: shorter, longer, shortest, longest).
E9.
Measure and estimate length using nonstandard units (e.g., paper clips) and standard units (e.g., inches).
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
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 E
Add It Up
Teacher Guide - digital
E12.
Use mental math strategies to add (direct modeling, counting strategies, reasoning from known facts) for the facts in Group C with sums to ten.