Select five or six computer functions that you'd like to highlight. The most basic functions are often the easiest to understand, but it's also helpful to teach students about Internet exploration as well. These will become your center bubbles.
Arrange students into groups and assign each group a function. Some functions you might want to focus on could include word processing, spreadsheets, media, Internet and images. Take into consideration the ages of your students when assigning functions.
Instruct each group to use lines and attached bubbles to define different ways that each function can be helpful when using a computer. For instance, if the base bubble word was "word processing," some of the attached bubbles could include book reports, lists, research, writing letters or making posters. This helps students explore the possibilities of each computer function.
Invite the student groups to the front of the class to discuss each computer function and the results of their bubble graphs. While presenting, talk about the various programs that work well for each function. For instance, "word processing" is often done in Microsoft Word, making the bubble graph a solid introduction into software as well as computer exploration.
Combine bubble graphs into double bubble graphs when you notice more than one group noting the same function on their graphs. Both the word processing group and spreadsheet group might choose "organizing information" as their functions, which you can then point out as as similarity by creating two bubble graphs connected by the like functions.