This short video and interactive assessment activity is designed to teach second graders about capacity problems with illustrations - word problems.
This short video and interactive assessment activity is designed to teach second graders about capacity problems with illustrations - word problems.
This short video and interactive assessment activity is designed to teach fifth graders about challenging multi-step money problems.
This short video and interactive assessment activity is designed to teach fifth graders about choosing the correct unit with liters or milliliters.
The purpose of this task is for students to find different pairs of numbers that sum to 7.
This short video and interactive assessment activity is designed to teach fifth graders about coins and bills.
This short video and interactive assessment activity is designed to teach second graders about making observations about capacity (metric units).
This short video and interactive assessment activity is designed to teach second graders about making observations about capacity (metric units).
This short video and interactive assessment activity is designed to teach second graders about comparing the capacity by formula in quarts, pints and cups.
This short video and interactive assessment activity is designed to teach second graders about comparing gallons and quarts by pictures.
This short video and interactive assessment activity is designed to teach fifth graders about multiple object lengths (english units).
This short video and interactive assessment activity is designed to teach first graders about multiple object lengths (english measurement).
This short video and interactive assessment activity is designed to teach second graders about comparing gallons, pints, and quarts by formula.
This short video and interactive assessment activity is designed to teach second graders about comparing capacity with pictures (english units).
This short video and interactive assessment activity is designed to teach third graders an overview of conversion among units of measure.
This short video and interactive assessment activity is designed to teach third graders about comparing cups and pints by formula.
This short video and interactive assessment activity is designed to teach second graders about comparing cups and pints by pictures.
This short video and interactive assessment activity is designed to teach third graders about comparing cups and quarts by formula.
This short video and interactive assessment activity is designed to teach second graders about comparing cups and quarts by pictures.
Unit 8: Data Sets and Distribution
Lesson 14: Comparing Mean and Median
In this lesson, students investigate whether the mean or the median is a more appropriate measure of the center of a distribution in a given context. They learn that when the distribution is symmetrical, the mean and median have similar values. When a distribution is not symmetrical, however, the mean is often greatly influenced by values that are far from the majority of the data points (even if there is only one unusual value). In this case, the median may be a better choice.
At this point, students may not yet fully understand that the choice of measures of center is not entirely black and white, or that the choice should always be interpreted in the context of the problem (MP2) and should hinge on what insights we seek or questions we would like to answer. This is acceptable at this stage. In upcoming lessons, they will have more opportunities to include these considerations into their decisions about measures of center.