Security / cops at my school were never really super uptight so skipping was fun. Any who our lunch is in the middle of a 2 hour class and once it started that's when we left. 600 kids going to the cafeteria created more than enough for our groups to sneak out. My friends and I would usually get a group of people who also want to leave (6-12 people). After that we all call each other and with the right timing and communication we splinter celled our way out the school past security and cops to the parking lot into our cars and woosh! We all benefited by helping each other get out and we got back to our group of friends and took off. After that we either went and chilled at someones house, went to eat at a restaurant, go to the mall, movies, or whatever and then went back for our 4th period. I don't know about you guys but High School was really -blam!- fun for me. The fact that mine was huge and wasn't strict made it even better.