Create your own!
"Barbie, what are you doing with that pencil? This is 2015, get with the modern age." said the teacher. "Well, technically I don't need to be here. I put myself as graduated in the gradebook." replied Barbie. "How did you do that?" said the teacher. "Gosh, it was a simple buffer overflow. If you change the p parameter in the main gradebook page, you can overflow it."