## Lesson: Keeping Track of and Displaying Data

Developing the Concept

Once students feel comfortable with keeping track of data using tally marks, introduce them to a way to visualize and organize their results. You may wish to create a bar graph or a line plot with the results. Encourage students to share their thoughts and strategies as the lesson progresses.

** Materials:** paper for each student, carpenter's tape measure

** Preparation:** none

** Prerequisite Skills and Concepts:** Students should have basic measuring and counting skills. Students should be able to make tally marks and interpret data.

Distribute a sheet of paper to each student. Have them fold the paper to make an airplane.

**Wrap-Up and Assessment Hints**

In pairs, have students organize and represent other data in a tally chart and a line plot. Remind students to give appropriate titles and labels as needed. Be sure they check the tallies in each category against the X's of their line plot. As you assess each student, check if he or she has a clear understanding of the tally marks and can interpret the tally chart and line plot meaningfully.