Unit 9 of 11 in a semester-long Middle School Computer Science course in Scratch (Units 1-8) and JavaScript (Units 10-11). Strategically placed between the Scratch and JavaScript sections of the course, this offline unit encourages students to use the computational thinking and logical reasoning skills they have been developing to redesign tic tac toe in an iterative design process. Includes lesson plans and all necessary course materials, including a presentation, activity handouts, project r