Getting out of an exam is always a fine thing for a student, though surely it would've been nice to not have to put all this work into it beforehand.
Via NBC:
Teachers at nine high schools in northeastern Australia discovered days before an ancient history exam that they had mistakenly taught their students about the wrong Roman ruler — Augustus Caesar instead of his predecessor, Julius Caesar.
Your teacher as he's about to administer an exam when he finds out he taught you about the wrong guy:

I mean, admittedly, it is hard to keep track of all these Roman guys. "Augustus," "Caesar," there's a lot of them. Throw in a "Marcus" and a "Flavius" or two and you can get really turned around.
Of course, one would expect state education leaders to get it right! But perhaps that's asking a bit too much from public school leaders. And to be fair, they'd been teaching about the other guy for nearly half a decade:
The Queensland Curriculum and Assessment Authority said it had told the state's 180 high schools two years ago that the ancient history exam topic would change to Julius Caesar in 2025. The topic had been Augustus Caesar for the previous four years
It can be hard to adjust to new paradigms — just ask Caesar himself! — but of course they did have some time to prepare for this, so you'd think they could have gotten it right.
You got to love how much school leaders are overstating the incident, though:
...Education Minister John-Paul Langbroek said he would investigate the mix-up, describing the experience for the students as "extremely traumatic."
Uh, yeah. I can tell you exactly how those students felt after they got out of a history exam, and it wasn't "traumatic:"

P.S. Now check out our latest video 👇