This training module on the Roaring River bridge design project was developed for a problem-solving unit in a ninth-grade research and development course. This project requires six to seven class periods and requires students to work in teams of two. The project contains the following information: level; time required; description; objectives; content--problem solving, structural stress, types of bridges, and budget/materials specifications/limitations; methodology; student worksheets; resources; and evaluation (125 total points)--bill of materials (20 points), bridge design paper (20 points), craftsmanship (20 points), general design (15 points), and bridge testing (50 points). The following materials are included: a diagram of acceptable and unacceptable construction joints; materials ledger; Roaring River bridge design evaluation; optional problems to be presented to student groups; an outline on the problem-solving process; and a radioactivity problem. (NLA)