Firsthand: Investigating Number Sense, Addition, and Subtraction, Grades K-3

Samples

Review sample lessons and components from Investigating Number Sense, Addition, and Subtraction (Grades K–3)

Overview Book
Preface

Unit Book
Unit Overview for Measuring for the Art Show: Addition on the Open Number Line

Sample session from Measuring for the Art Show, Day Six: Pricing the Ingredients
A minilesson reviews adding groups of ten within the context of measurement. A new measurement context introduces double-digit addition with strips of ten. A subsequent math congress supports the use of more efficient strategies.

Read-Aloud Books
Measuring for the Art Show, the read-aloud book that accompanies the unit by the same name.

Resource Guides
Games for Early Number Sense Contents and Overview
Minilessons for Early Addition and Subtraction Contents and Overview
Minilessons for Extending Addition and Subtraction Contents and Overview

CD-ROM
You will need the lastest version of the Macromedia Flash Player to view the following clips, click here to get it. Speakers recommended.

Video clip: The Thinking Behind Contexts for Learning Mathematics
Video clip: The Importance of Context

Video clip: Investigation in Action: Organizing and Collecting