Middle school students consolidate their understanding of integers and rational numbers, increasing their facility with fractions, decimals and percents and encountering proportionality. This book shows how students can explore these important ideas in such diverse activities as exchanging currency and using area models to develop algorithms for multiplying and dividing fractions. Underlying each activity is the belief that students learn best when they build computational fluency on a firm conceptual foundation. The supplemental CD-ROM features interactive electronic activities, master copies of activity pages for students and additional readings for teachers.

Numbers and the operations that we perform with them are the starting points for all mathematics. Accordingly, Principles and Standards for School Mathematics makes the Number and Operations Standard first among the five Content Standards and gives it a centrality across the mathematics curriculum from prekindergarten through grade 12.

Rese�a del editor

Middle school students consolidate their understanding of integers and rational numbers, increasing their facility with fractions, decimals and percents and encountering proportionality. This book shows how students can explore these important ideas in such diverse activities as exchanging currency and using area models to develop algorithms for multiplying and dividing fractions. Underlying each activity is the belief that students learn best when they build computational fluency on a firm conceptual foundation. The supplemental CD-ROM features interactive electronic activities, master copies of activity pages for students and additional readings for teachers. Numbers and the operations that we perform with them are the starting points for all mathematics. Accordingly, Principles and Standards for School Mathematics makes the Number and Operations Standard first among the five Content Standards and gives it a centrality across the mathematics curriculum from prekindergarten through grade 12.

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Better World Books (https://www.BetterWorldBooks.com) is a for-profit, socially conscious business and a global online bookseller that collects and sells new and used books online, matching each purchase with a book donation. Each sale generates funds for literacy and education initiatives in the U.S., the UK, and around the world. Since its launch in 2003, Better World Books has raised $33 million for libraries and literacy, donated over 32 million books, and reused or recycled more than 397 million books.

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