TTJ3C (TTJ4C, TTJ3O, TTJ4E) - During this activity students will disassemble, inspect and reassemble a gasoline engine used to power an automobile or recreational vehicle. Up to 24 students per teacher. Groups of students use instructional resources to work on a variety of challenges related to different topics. As many as 10 different challenges may be running in the shop area at one time. Each group of students creates a Plan of Action (POA) showing how they are going to approach the challenge, each POA is reviewed by the instructor. Students do not proceed to work on the challenge until their POA has been approved.