SketchUp can be used for making 3D drawings of designs that can be modeled, shared with others and be 3D printed, or it can be used for creating 2D drawings that can then be cut out on the laser cutter.
First you will need to have a folder set up in your Google drive to save your work in - see the video below for how to do this. You must be logged on to your school Google account.
There are lots of tutorials available on you tube, some of the best I have found are linked below. Make sure that you look at tutorials for SketchUp for schools as that is what we use through our school accounts.