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• "CCSS.Math.Content.7.NS.A.3"
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## Sailor Monkeys

### little problems with big solutions

Two problems involving grouping invite students to devise their own model and strategies.

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## Cartoon Corner: Math That's Out of This World

A cartoon involving astronomy and astronomical units is coupled with a full-page activity sheet.

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## Five Steps to Zero: A Game for Number Sense and Reasoning

A game called Five Steps to Zero and its variations are meant to help students with mathematical reasoning.

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## Pruning Trees

### big solutions to little problems

Solutions to a previous Solve It problem are discussed, and the procedures used with problem solving are explored.

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## Cartoon Corner: Investing in Whose Retirement?

A cartoon highlighting growth of a retirement fund is coupled with a full-page activity sheet.

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## Responding to Students' Work on a Rich Task

Students engage in a fractions task involving 2/3 men and 3/5 women, and teachers analyze their thinking.

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## Multidimensional Teaching

See how one seventh-grade teacher melds NCTM's Process Standards, CCSSM's Standards for Mathematical Practice, and multidimensional teaching to engage students.

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## Systematic Interventions for Teaching Ratios

Consider this research-based intervention approach to ratio using concrete, semiconcrete, and abstract representations to help students who struggle with this concept.

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## Decimal Fractions: An Important Point

Teachers who are skilled at recognizing students' misconceptions about decimals are better equipped to make instructional decisions that build on these ideas.

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## Math for Real: How Much Time Will Lena Save?

### “when will I ever use this?”

This problem ties in the Pythagorean theorem while two people walk around or across a park.