The following videos were produced by parents/students at Cy-Woods High School in Houston and are shared with the permission of their coaching staff. They give a good overview of tournament basics, judging 101, the events, etc. If you are fulfilling a judging requirement for HHS Speech & Debate, this is a GREAT place to start for information!
Also attached is the "Lay Judge Packet". "Lay Judge" refers to a judge who is from the community, basically someone who didn't compete or coach speech/debate. An overview of the events is included in that packet, along with some dos and don'ts of writing ballots for tournaments.