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## A Fair and Balanced Approach to the Mean

A sequence of five activities, progressing from concrete to abstract, can help students develop deep understandings of the mean.

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## Puppy Love

### little problems with big solutions

To elicit creative student thinking, this open-ended problem asks solvers to analyze area and perimeter.

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## Puppy Love

### 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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## The Mean as Balance Point

Using a rule as a seesaw helps students steady their understanding of the mean.

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## Solutions: The school bus dilemma

This section of the Problem Solvers department discusses the classroom results of using problems presented in previous issues of Teaching Children Mathematics.

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## School Bus Dilemma

This month's problem engages students in statistics, namely descriptive statistics. During the lesson, students will work with two measures of central tendency, the mean and the mode.

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## Invention Activities Support Statistical Reasoning

Students investigate how well an online game helps them learn.

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## How Many Jelly Beans are in the Jar?

Students' mathematical intuition about estimation can serve as an entry point for tasks exploring measures of center.

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## Solve It! Student Thinking: Suit Up!

### big solutions to little problems

Solutions to a November 2012 Solve It! problem are discussed, and the procedures used with problem solving are explored.

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## Problem Solve with Presidential Data

An engaging activity analyzing the average age of U.S. presidents not only integrates history and mathematics but also examines measures of central tendency and its appropriate uses.