Through videoconferencing, two classes battle out their knowledge of rocks and minerals and the rock cycle by playing baseball. Each class completes a unit on rocks, minerals, and the rock cycle which includes gathering facts from print and non-print resources, classroom activities, and experiments. Each class then creates PowerPoint slides with questions (and answers) to pitch to the opposing team. The teams meet on the videoconference playing field to determine which class is the champion of rocks! The virtual baseball game serves as the culminating activity of a unit on rocks.