This WebQuest should take place at the beginning of a unit on Human Interactions with the Environment. It can serve as an introduction to the entire unit, but it also teaches students a lot about this topic. One-two days should be spent on research and completing the chart as a group. The carbon footprint step will take less than an hour, and can also be completed at home. The group discussion can serve as the introduction to creating the podcast, and the process of making the podcast should last around three-four days depending on how long you would like them to be. I think it would be beneficial for the groups to play their podcasts to the rest of the class once all of them are complete. This will be fun for the class, and they can compare their final products to the rest of the group.
Teacher involvement is important throughout the days during this WebQuest. Students will need guidance through their research, and some students may need help with the different forms of technology. Depending on what part of the year it is, you may want to review different computer and iMovie hints and skills. Besides that, students should have a great time completing this WebQuest!