## Overview

Think Math! is founded upon the principle that children are curious problem solvers. Each grade level’s content builds a puzzler’s disposition, developing mathematical “habits of mind” through games, puzzles, mental math, and other collaborative activities – with the goal of providing engaging and motivating experiences for a community of diverse learners.

In Think Math!, second graders extend and deepen their understanding of the base-ten system. They represent numbers (up to 1000) in expanded form using objects, pictures, sounds, and numbers. They experiment with grouping and regrouping, noticing that sometimes it is necessary to compose a ten or hundred. Children build their repertoire of addition and subtraction strategies and come to understand addition and subtraction as inverse operations. They explore measurement in the context of linear measurement, telling time, weight, and capacity – and describe and analyze shapes, considering their attributes.

All student materials can be accessed through the table below as PDFs by chapter.

## Chapter Listing

Chapter Topics Think Math! Resources
Chapter 1: Counting Strategies
• Using number lines
• Previewing multiplication
Chapter 1 Student Lesson Activity (LAB) pages

Chapter 1 Practice pages Chapter 1 Extension pages Chapter 1 Activity Masters

Chapter 1 School-Home Connection Letter (English/Spanish)

Chapter 2: Working with 10
• Comparing numbers
• Understanding the relationships between numbers
Chapter 2 Student Lesson Activity (LAB) pages

Chapter 2 Practice pages Chapter 2 Extension pages Chapter 2 Activity Masters

Chapter 2 School-Home Connection Letter (English/Spanish)

Chapter 3: Place Value
• Bundling
• Recording

Chapter 3 Student Lesson Activity (LAB) pages

Chapter 3 Practice pages Chapter 3 Extension pages Chapter 3 Activity Masters

Chapter 3 School-Home Connection Letter (English/Spanish)

Chapter 4: Addition and Subtraction with Place Value
• Representing numbers and regrouping
• Working with money
Chapter 4 Student Lesson Activity (LAB) pages

Chapter 4 Practice pages Chapter 4 Extension pages Chapter 4 Activity Masters

Chapter 4 School-Home Connection Letter (English/Spanish)

Chapter 5: Probability and Data
• Exploring Probability
• Making and using real-object and picture graphs
• Making and using bar graphs
• Making and using pictographs
• Making and using line graphs
Chapter 5 Student Lesson Activity (LAB) pages

Chapter 5 Practice pages Chapter 5 Extension pages Chapter 5 Activity Masters

Chapter 5 School-Home Connection Letter (English/Spanish)

Chapter 6: Measuring Time
• Working with units of time
• Using time as a context for solving problems
Chapter 6 Student Lesson Activity (LAB) pages

Chapter 6 Practice pages Chapter 6 Extension pages Chapter 6 Activity Masters

Chapter 6 School-Home Connection Letter (English/Spanish)

Chapter 7: Doubling, Halving, and Fractions
• Having and doubling
• Understanding fractions as parts of a whole
Chapter 7 Student Lesson Activity (LAB) pages

Chapter 7 Practice pages Chapter 7 Extension pages Chapter 7 Activity Masters

Chapter 7 School-Home Connection Letter (English/Spanish)

Chapter 8: Building Addition and Subtraction Fluency
• Understanding addition and subtraction as inverse operations
• Composing and decomposing numbers
Chapter 8 Student Lesson Activity (LAB) pages

Chapter 8 Practice pages Chapter 8 Extension pages Chapter 8 Activity Masters

Chapter 8 School-Home Connection Letter (English/Spanish)

Chapter 9: Two-Dimensional Figures and Spatial Sense
• Identifying and classifying two-dimensional figures
• Exploring congruence, similarity, and symmetry
• Measuring area and describing paths on a grid
Chapter 9 Student Lesson Activity (LAB) pages

Chapter 9 Practice pages Chapter 9 Extension pages Chapter 9 Activity Masters

Chapter 9 School-Home Connection Letter (English/Spanish)

Chapter 10: Adding and Subtracting Larger Numbers
• Adding and subtracting with “like” sets
• Composing and decomposing numbers
Chapter 10 Student Lesson Activity (LAB) pages

Chapter 10 Practice pages Chapter 10 Extension pages Chapter 10 Activity Masters

Chapter 10 School-Home Connection Letter (English/Spanish)

Chapter 11: Skip-Counting and Equivalent Sets
• Working with arrays
• Introducing division
Chapter 11 Student Lesson Activity (LAB) pages

Chapter 11 Practice pages Chapter 11 Extension pages Chapter 11 Activity Masters

Chapter 11 School-Home Connection Letter (English/Spanish)

Chapter 12: Measuring Length
• Using units of measure
• Estimating and measuring
Chapter 12 Student Lesson Activity (LAB) pages

Chapter 12 Practice pages Chapter 12 Extension pages Chapter 12 Activity Masters

Chapter 12 School-Home Connection Letter (English/Spanish)

Chapter 13: Exploring Multiplication and Division
• Exploring multiplication
• Exploring division
• Relating multiplication and division
Chapter 13 Student Lesson Activity (LAB) pages

Chapter 13 Practice pages Chapter 13 Extension pages Chapter 13 Activity Masters

Chapter 13 School-Home Connection Letter (English/Spanish)

Chapter 14: Comparing and Contrasting Three-Dimensional Figures
• Identifying figures
• Classifying figures by attributes
Chapter 14 Student Lesson Activity (LAB) pages

Chapter 14 Practice pages Chapter 14 Extension pages Chapter 14 Activity Masters

Chapter 14 School-Home Connection Letter (English/Spanish)

Chapter 15: Capacity, Weight/Mass, and Temperature
• Measuring capacity
• Exploring weight and mass
• Measuring temperature
Chapter 15 Student Lesson Activity (LAB) pages

Chapter 15 Practice pages Chapter 15 Extension pages Chapter 15 Activity Masters

Chapter 15 School-Home Connection Letter (English/Spanish)

Chapter 16: Multiplying and Dividing
• Working with multiplication tables
• Relating multiplication and division
Chapter 16 Student Lesson Activity (LAB) pages

Chapter 16 Practice pages Chapter 16 Extension pages Chapter 16 Activity Masters

Chapter 16 School-Home Connection Letter (English/Spanish)