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 baseten 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 

Chapter 1 Student Lesson Activity (LAB) pages Chapter 1 Practice pages Chapter 1 Extension pages Chapter 1 Activity Masters 
Chapter 2: Working with 10 

Chapter 2 Student Lesson Activity (LAB) pages Chapter 2 Practice pages Chapter 2 Extension pages Chapter 2 Activity Masters 
Chapter 3: Place Value 

Chapter 3 Student Lesson Activity (LAB) pages Chapter 3 Practice pages Chapter 3 Extension pages Chapter 3 Activity Masters 
Chapter 4: Addition and Subtraction with Place Value 

Chapter 4 Student Lesson Activity (LAB) pages Chapter 4 Practice pages Chapter 4 Extension pages Chapter 4 Activity Masters 
Chapter 5: Probability and Data 

Chapter 5 Student Lesson Activity (LAB) pages Chapter 5 Practice pages Chapter 5 Extension pages Chapter 5 Activity Masters 
Chapter 6: Measuring Time 

Chapter 6 Student Lesson Activity (LAB) pages Chapter 6 Practice pages Chapter 6 Extension pages Chapter 6 Activity Masters 
Chapter 7: Doubling, Halving, and Fractions 

Chapter 7 Student Lesson Activity (LAB) pages Chapter 7 Practice pages Chapter 7 Extension pages Chapter 7 Activity Masters 
Chapter 8: Building Addition and Subtraction Fluency 

Chapter 8 Student Lesson Activity (LAB) pages Chapter 8 Practice pages Chapter 8 Extension pages Chapter 8 Activity Masters 
Chapter 9: TwoDimensional Figures and Spatial Sense 

Chapter 9 Student Lesson Activity (LAB) pages Chapter 9 Practice pages Chapter 9 Extension pages Chapter 9 Activity Masters 
Chapter 10: Adding and Subtracting Larger Numbers 

Chapter 10 Student Lesson Activity (LAB) pages Chapter 10 Practice pages Chapter 10 Extension pages Chapter 10 Activity Masters 
Chapter 11: SkipCounting and Equivalent Sets 

Chapter 11 Student Lesson Activity (LAB) pages Chapter 11 Practice pages Chapter 11 Extension pages Chapter 11 Activity Masters 
Chapter 12: Measuring Length 

Chapter 12 Student Lesson Activity (LAB) pages Chapter 12 Practice pages Chapter 12 Extension pages Chapter 12 Activity Masters 
Chapter 13: Exploring Multiplication and Division 

Chapter 13 Student Lesson Activity (LAB) pages Chapter 13 Practice pages Chapter 13 Extension pages Chapter 13 Activity Masters 
Chapter 14: Comparing and Contrasting ThreeDimensional Figures 

Chapter 14 Student Lesson Activity (LAB) pages Chapter 14 Practice pages Chapter 14 Extension pages Chapter 14 Activity Masters 
Chapter 15: Capacity, Weight/Mass, and Temperature 

Chapter 15 Student Lesson Activity (LAB) pages Chapter 15 Practice pages Chapter 15 Extension pages Chapter 15 Activity Masters 
Chapter 16: Multiplying and Dividing 

Chapter 16 Student Lesson Activity (LAB) pages Chapter 16 Practice pages Chapter 16 Extension pages Chapter 16 Activity Masters 