This formative evaluation gathered feedback from third and fourth graders in response to two stories proposed for further development. The general goals for the formative evaluation were To assess reactions to the storylines, given two short audiotapes with color illustrations; To evaluate difficulty level and comprehension of the problem solving activities. Cyberchase is the Emmy Award-winning mathematics series and website on PBS KIDS GO! using broadcast, web, new media and educational outreach to impact millions nationwide. Designed for children ages 8 to 11 and packed with mystery, humor