## Lesson: Graphing Data

Developing the Concept

Your children have now learned how to create tally charts and picture graphs. While these are good ways to represent and compare data, they are not the only ways. Children will now learn another way to represent data by learning how to create and read bar graphs.

**Materials:** The posterboard Shirt Color tally chart and picture graph from the Introducing the Concept Lesson; a posterboard bar graph showing the shirt color data from the Introducing the Concept Lesson; a blank overhead transparency of Learning Tool 20 from the *Learning Tools Folder;* one copy of Learning Tool 20 for each child; crayons

**Preparation:** Make an overhead transparency of Learning Tool 20 and one copy for each child. Create a bar graph on posterboard showing the data from the shirt-color survey from the Introducing the Concept lesson. Tape the Shirt Color tally chart to the chalkboard.

**Prerequisite Skills and Concepts:** Children should know how to collect data on a tally chart and how to transfer it to a picture graph.

Begin by reviewing tally marks by using the Shirt Color tally chart from the previous lesson. Ask the children which shirt color group has [3] people in it. Repeat, using numbers from the other shirt-color groups on the tally chart.

**Wrap-Up and Assessment Hints**

To check children's understanding of the different ways of representing data, have them do a simple survey. First, they should formulate a question.
Then have them create a tally chart and survey ten classmates. Have children use the data in their tally chart to create a picture graph or bar graph to show the results of their survey. Children can present their graphs to the class. Allow them to ask the class two or three simple questions about their graphs.