Some 12th grade students accessed the printing system of the school.
That meant that they could access every test that the teachers sent to print.
What happened? They started selling the tests to the rest of the 12th grade students.
It became so popular that every 11th and 12th grade student knew it and bought the tests.
But grades started to inflate too much and teachers started noticing. It's said that a math teacher put an college-level exercise on a test to see if they were preparing for them beforehand in some way. Another teacher told a friend that he noticed it all along and didn't say anything.
It all exploded at the end of the year. The teachers noticed and the school found evidence in the Students Counsel and Students Newspaper computers.
They couldn't expell any student because they were already finishing their high school education.