Section A: Add Within 1,000
Lesson 1: Represent Numbers in Different Ways
Warm-up: Which One Doesn’t Belong: Numbers within 1,000
1.1: Card Sort: Numbers in Their Different Forms
1.2: Numbers in Different Forms Round Table
Lesson 2: Addition and Subtraction Situations
Warm-up: Notice and Wonder: Two Curious Tables
2.1: Monuments and Falls
2.2: Journal About Connections
Lesson 3: Add Your Way
Warm-up: Number Talk: Hundreds, Tens, and Ones
3.1: Strategies to Add
3.2: Two Ways to Add
Lesson 4: Introduction to Addition Algorithms
Warm-up: Which One Doesn’t Belong: 247
4.1: What is an Algorithm?
4.2: Try an Algorithm
Lesson 5: Another Addition Algorithm
Warm-up: Notice and Wonder: Another Curious Table
5.1: A New Addition Algorithm
5.2: Compose New Units
Lesson 6: Use Strategies and Algorithms to Add
Warm-up: Number Talk: Little More, Little Less
6.1: Just Ones
6.2: How Would You Add?
Section A Summary
Section A Practice Problems
Section B: Subtract Within 1,000
Lesson 7: Subtract Your Way
Warm-up: Number Talk: Subtract Two-Digit Numbers
7.1: Strategies to Subtract
7.2: Base-ten Drawings
Lesson 8: Subtraction Algorithms (Part 1)
Warm-up: Number Talk: Subtraction Strategies
8.1: From Drawings to an Algorithm
8.2: Card Sort: Diagrams and Algorithms
Lesson 9: Subtraction Algorithms (Part 2)
Warm-up: True or False: Does It Commute?
9.1: Revise Subtraction Work
9.2: Try the Algorithm
Lesson 10: Subtraction Algorithms (Part 3)
Warm-up: Notice and Wonder: Digits that Disappear
10.1: A New Subtraction Algorithm
10.2: Try Clare’s Algorithm
Lesson 11: Analyze Subtraction Algorithms
Warm-up: Number Talk: Subtract within 1,000
11.1: Compare Two Subtraction Algorithms
11.2: Use an Algorithm?
Lesson 12: Subtract Strategically
Warm-up: Number Talk: Threes
12.1: How Would You Subtract?
12.2: Greatest Difference, Smallest Difference
Section B Summary
Section B Practice Problems
Section C: Round Within 1,000
Lesson 13: Multiples of 100
Warm-up: Estimation Exploration: Marching Band
13.1: About 100? Close to 100?
13.2: Close to Multiples of 100
Lesson 14: Nearest Multiples of 10 and 100
Warm-up: Estimation Exploration: What Number Could this Be?
14.1: Close to Multiples of 10
14.2: The Nearest Multiples
Lesson 15: Round to the Nearest Ten and Hundred
15.1: Can the Nearest Ten and Hundred be the Same?
15.2: Round to Estimate
Lesson 16: Round and Round Again
Warm-up: Number Talk: More Groups, Fewer Groups
16.1: All the Numbers
16.2: What’s My Mystery Number?
Section C Summary
Section C Practice Problems
Section D: Solve Two-Step Problems
Lesson 17: Does It Make Sense?
Warm-up: True or False: Is it Greater?
17.1: Quick Estimates
17.2: Solve and Reason
Lesson 18: Diagrams and Equations for Word Problems
Warm-up: Notice and Wonder: Diagrams
18.1: Card Sort: Situations, Equations, and Diagrams
18.2: Makes Sense to Me: A Gallery Walk
Lesson 19: Situations and Equations
Warm-up: Notice and Wonder: The Unknown
19.1: Mai’s Beads
19.2: Represent, Solve, Explain
Lesson 20: More Practice to Represent and Solve
Warm-up: Number Talk: Two Steps
20.1: Info Gap: Introduction
20.2: Info Gap: Bake Sale
Section D Summary
Lesson 21: Classroom Supplies
Warm-up: Notice and Wonder: School Supplies List
21.1: Make a Wish List
21.2: What's on Your List?
Section D Practice Problems