Designed for the Bringing Out Head Start Talents (BOHST) project, three sets of lesson plans focus on the development of three types of thinking processes with preschool children: (1) "detective thinking" (using clues to find the single right answer); (2) "inventor thinking" (brainstorming many answers to a single question); (3) "judge lessons" (evaluating options to make careful decisions). Each of the 3 sections contains an introduction, a model lesson, and 10 additional lesson activities. Lesson format includes a goal statement, a list of materials, detailed steps in carrying out the activity, and suggestions for follow-up lessons. Appended is a booklet containing 14 at-home activities intended to encourage creative, productive thinking from the perspective of the three types of thinking processes. (JW)