This USMES unit challenges students to build a burglar alarm which will give adequate warning. The teacher resource book for the Burglar Alarm Design unit contains five sections. The first section describes the USMES approach to student-initiated investigations of real problems, including a discussion of the nature of the USMES "challenges" and of classroom strategy for problem-solving activities. The second section gives information about the Burglar Alarm Design unit, including an overview of possible student activities with comments on prerequisite skills, a flow chart and composite log indicating the range of possible student work, a paper describing the use of the unit in primary grades, and a list of questions that the teacher might use. Section 3 contains documentation of class activities, describing ways of introducing the unit and including teachers' logs for the unit. Section 4 includes references to other written materials relevant to the unit and section 5 consists of charts which identify the skills, concepts, and processes covered by the unit. (DT)