Range and ModeOnce children feel comfortable analyzing bar graphs, pictographs, and tally charts, they are ready to learn about two special numbers that summarize data. Introduce two new vocabulary terms: mode and range. Materials: one postit for each student Preparation: none Prerequisite Skills and Concepts: Children should have basic counting skills and be familiar with time lengths in hours. Children should be able to interpret data. Draw the grid for a bar graph on the board. At equal intervals, write the following categories: 0 hours, about 1 hour, about 2 hours, about 3 hours, and about 4 hours.

Keeping Track and Displaying Data: Range and Mode:

