In this activity, students will design and build and energy effecient home. The effeciency of each home will be tested as a lab in the classroom. The handout is currently in a scientific method format, but you can modify it to fit your needs. I haven't listed any safety precautions, however some may need to be taken when handling the hot water. In my classroom, I have been the one to test the home effeciency as the students observed.