Essential Question for 7th grade PBL:  How might we improve travel from one side of the lake to the other?

1st period solutionsFerry, Hovercraft, Bridge, Underwater tunnel, Hydra Terra(bus/boat)
6th period solutions: Car boat, Underwater Tunnel, Underwater Highway, Bridge, Heliplane
7th period solutions: Hover car, Hover bike, Bridge, Ferry, Helicopter