This USMES unit challenges students to find ways to improve or set up the Design Lab for the benefit of those who use it. The teacher resource book for the Design Lab 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 Design Lab 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 through 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)