This document outlines a final project using wikis to teach critical thinking skills. Students will collaborate in groups on a wiki to create a legislative proposal for a recycling program. They will conduct research, write the proposal, review each other's work, and publish their final product. The goals are for students to learn collaboration, knowledge construction, and design of their own learning community through this wiki activity. Teachers will be trained on using specific wiki tools and implementing a problem-based learning model for the project.