Erase the data in cells B2 through B9, replacing them with zeroes. The zero will help students see where to click to type the real number for each animal. Note that your chart has disappeared and a message reads, "Not Enough Chart Data." That's fine.

Click Format>Insert Header. Type "Our Pets," hit Return, and type the name of your class. (Mrs. Thomas' Class, for example). Your screen now should look like this:

If you like, you now can change the font size or other formatting. Then, save your work.

Now you're going to save the graph a second time -- as a template. A template is a file students can open and work on without changing the saved version. That allows you to use the same file for many students or many classes.

Click the down arrow next to the Save As field. In the larger Save window that appears, click the Template button.

In the Save As field, make sure the file is named something like PetGraph. Note that the extension -- the letters after the period -- are now "cws," not "cwk." The extension cws indicates that the file is a template.

Save the file on any student computers. You now are ready to use it in class.

Walk students through the steps of clicking next to each pet name and typing the number of pets they, their group, or the class as a whole have. Discuss how the chart changes as more or less pets are added. Ask which bars are taller and why. Before printing the graph, have each student click in cell A33 or somewhere close to there and type his/her name. That's it!

Next: Add finishing touches.