Make a three-column chart on the board with the headings “Person,” “Place,” and “Thing.” Pick a broad theme that relates to something else the students are learning about, such as “Ancient Rome,” “geometry,” or “genetics.” Encourage students to come up with at least five people, five places, and five things that relate to the theme. For people, a person related to geometry might be “Pythagorus” or “architect,” a place related to geometry might be “the Pentagon,” and a thing related to geometry might be “compass.” For a more advanced class, you might want to include a column for “idea” as well.