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"This resource offers a groundbreaking effort to make mathematics education research on ratios and proportions readily accessible and understandable to pre-service and in-service teachers of grades 6-8. Using extensive annotated samples of student work and based on research gathered in the Ongoing Assessment Project (OGAP), this engaging, easy-to-use book teaches readers how students develop understanding and fluency involving ratio and proportion concepts. Each chapter includes student work samples to illuminate the research, guidance on CCSSM standards, end of chapter Looking Back questions, and Instructional Links that help teachers relate concepts back to their own instructional materials"--

Fractions --- Ratio and proportion --- Mathematics --- Number concept in children --- Study and teaching (Middle school) --- Study and teaching --- Research