This workbook is designed to educate school personnel in randon detection. The workbook is intended for an audience of school officials, including administrators, business officers, facility managers, and maintenance and operations staff. It is meant to provide trainees with experience in planning a radon test, interpreting test results, implementing quality assurance during testing, and documenting the testing process for a school building. Each unit is prefaced by a unit overview and a list of participant objectives. Each objective relates to a segment of the unit, and the testing procedures are interspersed with exercises and activities. Some of the activities are fill-in-the-blank questions, whereas others require the application of information contained in the Environmental Protection Agency's testing guidance, entitled Radon Measurement in Schools. Answers to each section's activities can be found at the end of the unit, and it is hoped that these activities will reinforce the information presented in the workbook. (RJM)