Each unit took from two to three weeks to complete. The students had two classes per week and each class lasted for two and a half hours. The syllabus that we used is clearly different from a conventional Introduction to Psychology class. Our aim was to allow the students to explore various aspects of psychology rather than attempting to give them a thorough grounding in a subject which, we believed, would have been too difficult for them to understand at this stage. In fact one of the strengths of theme based CBI is its flexibility; teachers can create units with specific learner needs in mind. For example, Unit 3 began with some textbook readings followed by questions and written work. After this the students were given some advertisements to analyze and also brought in their own examples for use in group discussions. Finally, for a small group project, they designed their own advertisements and then presented their work to the other class members with a rationale for why they had chosen their product and who the target customers would be. Among the products they designed were a genetically engineered cake tree and a time vision camera.