## Lesson: Representing Data

Developing the Concept

Your students have had an opportunity to make a double bar graph with your help. It is now time for them to make one on their own with a little guidance from you.

**Materials:** graph paper, a ruler, and a pencil

**Preparation:** Make a poster with the following data on it:

Also set up a graph similar to the one below to show students how it should look.

**Prerequisite Skills and Background:** Students should be able to read a table and make a bar graph from the information in it.

**Wrap-Up and Assessment Hints**

Assessing a graph created by a student is a complex process. You may want to develop a rubric, giving points when students successfully complete various aspects of the graph. One such rubric is given below.

Has selected an appropriate graph to display the information | 2 points |

Has clearly displayed the key information | 2 points |

Has labeled the horizontal and vertical axes correctly | 1 point |

Has named the graph correctly | 1 point |

Has provided a key for reading the graph, if necessary | 1 point |