I talked to some of my friends from year 12, and some of them write the answers on the toilet's wall also and people who have their test another time would just go in and take a snap LOL. Other instances that occurred in my year, at the end of the exam someone would ask a question and the teacher would be busy with them not noticing what's going around. And that one person would pull out their Iphone and instantly take a snap of their exams, and spread it around on their Whatsapp group LOL. And the other class would have 1-2 periods to complete those questions before going into their test.
Another way I've seen people cheating is, the day before the exam, they'd go to the classroom in which they will have the upcoming exam and write formulas, things to remember, and such on the wall and on the day of the exam, they'd sit near the wall.
Yeah, a lot of kids wants to make their parents happy with their marks rather than learning the stuff