C

We wanted the class to work on their building skills since their programming seemed to be limited by what they could build. So, we had each group design and build a crane that could lift a weight from the floor. The program was simple, and something similar to what they did last week and the week before, but the building was challenging and took the majority of the time. 

The lesson went well, and we had the groups that finished more quicker create more advanced programs for their cranes to run.