The 6th grade is currently learning about the engineering design process in Science class.  We are working on the problem of creating a model car that will travel the farthest down a ramp.  Students developed criteria and constraints that their solutions need to meet. They brainstormed many different solutions for the problem.  We used a decision matrix to determine which solution best met our needs.  They are now building a prototype of the model car and testing it to improve the overall solution.