Forty-five lesson plans in geometry are presented which incorporate career education into the ordinary ninth-tenth grade geometry curriculum. The lessons focus on one or more of the following developmental areas of career education: self knowledge, individual and environment, world of work, economics, education and training, employability and work adjustment skills, and decision making. Each lesson identifies an instructional and developmental goal and gives performance objectives, activities, and resource materials. For example, in lesson 3 (parallelism and perpendicularity), the instructional goal is to recognize and be able to define parallel, perpendicular, and skew lines, while the developmental goal is to know why city planners use parallel and perpendicular streets in contrast to other arrangements in downtown areas. Some of the suggested activities are, in addition to having students construct parallel and perpendicular lines with a compass and straightedge, to look at a map of city streets and see parallel and perpendicular arrangements, and to have students set up criteria for downtown street arrangement and compare different possibilities. It is also suggested that a civil engineer could discuss what goes into city planning of street arrangement. (BB)