Sparkfun has a really nice video that goes through the basics of using an oscilloscope.
The Scope at Aalto Mechatronics Workshop
The oscilloscope we are using in the course is not exactly like the in the video, but all the same features are there. Please note that since there are lots of people using the space, the settings might have been changed. You might want to always quickly check everything is to your liking before using the scope.