Beschreibung:
The fourth edition of this groundbreaking text helps pre-service and in-service mathematics teachers build the comfort and confidence they need to begin talking to children about fractions and ratios, distilling complex ideas and translating research into usable ideas for the classroom.
1. Proportional Reasoning: An Overview 2. Fractions and Rational Numbers 3. Relative Thinking and Measurement 4. Quantities and Covariation 5. Proportional Reasoning 6. Reasoning with Fractions 7. Fractions as Part-Whole Comparisons 8. Fractions as Quotients 9. Fractions as Operators 10. Fractions as Measures 11. Ratios and Rates 12. Changing Instruction