Students recently completed a unit on Forces & Motion.  They learned about the six types of simple machines.  They know that work is a force applied to an object and a distance the object moves.  Friction is a  rubbing force which slows and eventually stops motion. They know that lubrication eases friction.  Students also had a week long Lego WeDo build that incorporated using their Chromebooks and Lego sets to build, program and run machines built with simple machines.  Scissors are a combination of a lever and a wedge