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• "CCSS.Math.Content.7.EE.B.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: Problem-Solving Perseverance Pays Off

A cartoon that explores long division is coupled with a full-page activity sheet.

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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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## From Mathematical Reading to Mathematical Literacy

If teachers have a deeper comprehension of their students' reading ability, it may lead to students' improved literacy and understanding of the subject.

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## Examining Mistakes to Shift Student Thinking

During a lesson on ratios involving percentages of paint, four research-based criteria are used to evaluate students' mistakes. The takeaway is that painting all mistakes with the same brush can also be a blunder.

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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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## Nifty Nines and Repeating Decimals

The traditional technique for converting repeating decimals to common fractions can be found in nearly every algebra textbook that has been published, as well as in many precalculus texts. However, students generally encounter repeating decimal numerals earlier than high school when they study rational numbers in prealgebra classes. Therefore, how do prealgebra students in the middle grades convert repeating decimals to fractions without using the age-old algebraic process (multiplying and finding the difference of two “stacked” equations) or without applying the precalculus approach of treating repeating decimal digits as an infinite geometric series?.

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## Cartoon Corner: When Life Gives You Lemons, Make Lemonade

A cartoon involving lemonade stands and interpreting percents is coupled with a full-page activity sheet.

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## Posing Cognitively Demanding Tasks to All Students

One middle school teacher developed classroom routines to make challenging questions accessible to all learners in her class.