Lesson 3

The Nameless Scribe

Est. Class Sessions: 1–2
X

Mathematical Standards

2.NBT.A
Understand place value. (2.NBT.A.1, 2.NBT.A.2)
2.NBT.B
Use place value understanding and properties of operations to add and subtract. (2.NBT.B.6, 2.NBT.B.7, 2.NBT.B.8, 2.NBT.B.9)
2.MD.B
Relate addition and subtraction to length. (2.MD.B.6)
2.OA.A
Represent and solve problems involving addition and subtraction. (2.OA.A.1)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in
solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP6.
Attend to precision.

A young girl has difficulty writing a three-digit number because she uses too many zeros. The girl exclaims in frustration that she would like to know who invented zero. Her mother tells a story that might resemble how zero was actually invented.

Content in this Lesson

  • Using and applying place value concepts to make connections among representations of numbers [E1].
  • Understanding the use of zero in writing large numbers.
  • Understanding place value.
  • Representing addition problems using base-ten pieces, number lines, and number sentences [E2].
  • Adding two-digit and three-digit numbers using mental math strategies (e.g., composing and decomposing numbers and counting on) [E3].
  • Knowing the important information in a problem [MPE1].
  • Choosing good tools and strategies to solve a problem [MPE2].
  • Showing work [MPE5].
  • Using labels to show what numbers mean [MPE6].

Daily Practice and Problems I–J

I. Show 372

J. Base-Ten Pieces

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book
Adventure Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

set of base-ten pieces (21 bits, 20 skinnies, and 3–5 flats)

Materials for the Teacher

Display of Math Practices (Student Activity Book) Reference
Unit 7 Assessment Record
Display set of base-ten pieces

Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED MATH PRACTICES EXPECTATION ASSESSED
King Gupta’s Feast
with Feedback Box
Student Activity Book
Pages 333–334
E1.
Use and apply place value concepts to make connections among representations of numbers to the thousands using base-ten pieces, number lines, expanded form, and standard form.
E2.
Represent addition problems using base-ten pieces, number lines, and number sentences.
E3.
Add two-digit and three-digit numbers using mental math strategies (e.g., composing and decomposing numbers, counting on) using the 200 Chart, base-ten pieces, and number lines.
MPE1.
Know the problem. I read the problem carefully. I know the questions to answer and what information is important.
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.

Vocabulary in this Lesson