http://www.fcseducation.org/housing--interior-design.html
These are geared towards high school but I used them to teach 6/7 graders. If you google you will find the supporting PowerPoint presentations and worksheets. I used them as my spine but modified the output to be more creative. We did lots of hands on projects, games, etc. YouTube was great for videos to reinforce the subject or help bring it alive. I did not purchase the text book that is mentioned. You can find many activities on Pinterest that correlate to the lessons.