In Lego class 2nd and 3rd graders have been learning about simple and powered machines using hands-on activities.
They investigated structures and forces, incorporating both rigid and flexible shapes in building
deck chairs and drawbridges.
Applying principles they learned about levers, they made drumming machines. Attaching a motor provided more opportunities to explore. For example, the students predicted how many times the drumming machines would tap in a minute and then tested them. They each came up with quite varied predictions, but they found the actual counts were very similar. They also innovated, adding pieces to change the tapping pattern, as well as pretending it was a typewriter. Next they will see how levers are used in making windshield wipers.
Our exploration of wheels and axles will include building a vehicle with a flywheel. Changes, such as wheel size and attaching a motor, will provide opportunities for measuring and comparing distance traveled, speed, and climbing ability. Undoubtedly, they will have their own ideas of how to alter the vehicles as well.
Although the children work hard in Lego class, it mostly feels like play.