1. Instructional activities: the building blocks for effective instruction -- 2. Lesson design: creating lessons that meet the needs of a diverse classroom -- 3. Beginnings: mathematics learning in early childhood -- 4. Whole numbers and numeration: naming and writing quantity -- 5. Adding and subtracting whole numbers: combining and separating quantities -- 6. Multiplying and dividing whole numbers: combining equal-sized groups and separating quantities into equal-sized groups -- 7. Fractions: working with units smaller than one -- 8. Decimals: working with base-units smaller than one -- 9. Measurement: assigning a number to a quantity -- 10. Geometry: learning the names and characteristics of shapes -- 11. Data analysis and probability: getting information from data and measuring likelihood.