Aizawa lets it slide... Mostly.

"...I can tell you're going to be a problem child already," the man grunted, but said nothing else as he pointed to a pile of gym uniforms, and said, "At any rate, I'm Shota Aizawa, your homeroom teacher, yada yada. Grab one your size, go to the locker rooms, put them on, your things in your assigned lockers, and meet me out in the field."

Izuku sighed in relief that Aizawa wasn't pressing the issue, and milled out of the classroom with his classmates. He quickly changed into the uniform, stuffing his clothes and his bag, the lamp safely inside it, into his assigned locker. He was briefly concerned about leaving it, but remembered the security measure he had Momo put on it, and it was locked away anyway. Not much need to worry.

They headed out. "Um, sir, what about Orientation?" Ochaco asked.

"Nothing more than a useless ceremony," Aizawa grunted. "All relevant information is on the pamphlet you will be given after class anyway." He then began to explain that he was going to be testing their Quirks, using normal physical tests they had done in school previously, but allowing them to use their Quirks in any way they saw fit to improve their scores.

Bakugo got to demonstrate what Aizawa meant by throwing the first ball, using an explosion to send it flying, and scoring well over 700 meters. Izuku stared, impressed. "That looks so fun, getting to use our Quirks for classes!" the pink girl cheered.

"Fun huh? This looks fun to you?" Aizawa asked sardonically. "Well then, let's make things interesting, shall we? Whoever scores in last place in the overall tests will be deemed to have no potential, and expelled immediately." He gazed at Izuku, a small smirk on his face, and Izuku stiffened. Did his comment piss Aizawa off after all? Bakugo was also looking at Izuku with a malicious glee. Momo proceeded to glare at both Aizawa and Bakugo, but was ignored.

"What!? But we all earned our placements here!" Ochaco protested. "That's completely unfair!"

"Oh, and you think natural disasters are? Or villain attacks? The world is full of unfairness, and Heroes are supposed to rise above that unfairness on a daily basis. Don't complain. This is what you signed up for," Aizawa said sternly. "So go beyond, Plus Ultra Style."

Momo couldn't deny that point... Life wasn't truly fair. Indeed, if someone other than Izuku had found her lamp, she would have had to live with those consequences, and been unable to even hate her situation, much less do anything about it. That was her one misgiving her human side had about her transformation into a genie.

Izuku meanwhile was panicking. He could barely use his new Quirk, and not at all safely, and after what he had said, he had no doubt Aizawa would follow through with his threat if he came in last. "Thanks a lot, big, fat, stupid mouth!" he mentally screamed as he wondered what to do.