#### The Double-Decker Bus: Early Addition and Subtraction (Contexts for Learning Mathematics, Grade K-3: Investigating Number Sense, Addition, and Subtraction) by Maarten Dolk

###### Maarten Dolk with The Double-Decker Bus: Early Addition and Subtraction (Contexts for Learning Mathematics, Grade K-3: Investigating Number Sense, Addition, and Subtraction)

- Bunk Beds and Apple Boxes: Early Number Sense (Contexts for Learning Mathematics, Grades K-3: Investigating Number Sense, Addition, and Subtraction)
- Organizing and Collecting: The Number System (Contexts in Learning Mathematics, Grades K-3: Investigating Number Sense, Addition, and Subtraction)
- Measuring for the Art Show: Addition on the Open Number Line (Contexts for Learning Mathematics, Grades K-3: Investigating Number Sense, Addition, and Subtraction)
- The T-Shirt Factory: Place Value, Addition, and Subtraction (Contexts for Learning Mathematics, Grades K-3: Investigating Number Sense, Addition, and Subtraction)
- Minilessons for Early Addition and Subtraction: A Yearlong Resource (Contexts for Learning Mathematics)
- Ages and Timelines: Subtraction on the Open Number Line (Contexts for Learning Mathematics, Grades K-3: Investigating Number Sense, Addition, and Subtraction)
- Field Trips and Fund-Raisers: Introducing Fractions (Contexts for Learning Mathematics, Grades 4-6: Investigating Fractions, Decimals and Percents)
- Beads and Shoes, Making Twos: Extending Number Sense (Contexts for Learning Mathematics)
- Games for Early Number Sense: A Yearlong Resource (Contexts for Learning Mathematics)
- Minilessons for Extending Addition and Subtraction: A Yearlong Resource (Contexts for Learning Mathematics)