You are working together in design teams.
Here is an example of collaboration with a bit of humor.
Please address the following questions in a blog to me:
For 7th grade:
1. What body system did you pick to build as a working model (7th grade)?
2. Why have you decided to build this body system as a working model (7th grade)?
3. What materials are you going to need to complete your build (7th grade)?
For 8th grade:
1. What are you going to build (8th grade)?
2. Why have you decided to build this object (energy transfer system) a working model (8th grade)?
3. What materials are you going to need to complete your build (8th grade)?