This product includes two versions of a letter to send home to parents to introduce a project on world biomes. Students will use the checklist to help them organize their research and plan their box diorama. This project has been a favorite of mine for several years. The students come up with such unique ways of modeling their ecosystems, and it is fun to see them stretch their creative muscles. This could be done as an individual or group activity. The duration of the lesson depends on your group. I expect it to take at least one week from start to finish. I hope you find this helpful!