It works

The Principal always struck you as a fatherly man with a heavy paunch and a shiny bald spot on his head, but now he looked positively menacing.

"So three of my students have all decided that safety regulations, school policy and public decency no longer apply to them. This is disappointing." The Principal hook his head as he addressed the three of us in the little room. "All of your parents will be informed of your behavior and at the very least the three of you will be suspended for a two week period, Sarah and the young sir here will also be facing expulsion pending a hearing with the board of trustees."

A giggle came from Rachel and all heads turned towards her.

"Sir did you ever stop to think why that alarm went off in the first place?"

"What are you saying Rachel, are you the one who pulled the alarm?"

"Yes Sir I am and the reason I pulled it was to get my hands on this." Rachel held up her phone and hit a button, the sounds of whips cracking and a harsh female voice filled the room along with Rachel's screaming.

The Principals eyes went wide and he stammered, "Y-you didn't."

"Yes I did and unless you want the world to know about you and the VP's sordid tastes you will let me and my friends go." all hint of kidding aside Rachel became all business. "I still have the marks from the whipping as well in case the police become involved."

The Principal was completely in shock without much choice he said, "Go, get out we won't be punishing you today, but you will not tell anyone of this."

Beyond belief you, Sarah and most of all Rachel managed to escape with absolutely no consequences. Once out in the hall Sarah rushed up and kissed Rachel fully on the mouth.

"Thank you Rachel, you have no idea the trouble I would have been in had they told my parents what happened."

"No problem, by the way what did you two do anyway?" you and Sarah related the story of your adventure that morning to Rachel. "Holy shit that is hot."

"Yeah but I think we'll have to be more careful in the future," you said.

"Oh not at all," said Rachel, "this isn't the only video of it's kind it's just the one I had time to upload onto my phone, there is a whole bunch of them in the A/V room, and I'm on more than a few of them."

You and Sarah were shocked at the revelation. "You're joking?"

"Not at all, this sort of thing has been going on for years and more than a few staff members, not just the teachers, are involved."

"How did you find out about this?" you ask.

"Oh well, my grades were slipping in math and the teacher came yo me with some "extra credit" work. He fucked me on camera and my grades went up, I saw the advantage to that and took it."

"And a good thing you did Rachel or we would have been expelled for sure. How can we ever thank you?" Sarah said.