This project will take students through the designing of a house using grid paper. Students will apply concepts like area, perimeter, multiplication, division, and spatial reasoning.
I highly recommend using the graph paper from: http://www.printfreegraphpaper.com/gp/c-m-5.pdf for this project.
This project will take about 2 to 2.5 weeks for students to complete. I've included a rubric for grading as well.
If you have any questions about the project, feel free to ask questions in the comments.