You have chosen...poorly.
By listening to the kids and challenging them, the noble teacher can inspire them to abandon lives of crime, stand up to gangs, and go to MIT and become a mathematician. Also, substitute teachers are usually gun-toting mercenaries willing to shoot their way through a drug ring and inspire the kids to excel.
The reality: American high schools are boring prisons for teenagers and the teachers are humorless tenured shits who would just as soon crush a kid's dreams as inspire them to sharpen a pencil. High schoolers can expect to watch a video vaguely related to their subject and then do busy work out of a book while their teacher text messages her therapist.
Submarines may be a day at the beach in real life, but in the movies they are inevitably trapped in a nightmare scenario.
The reality: Imagine a ship with no windows and especially cramped conditions. Welcome to life as a modern submariner, enjoy the stay.
We've found some cool stuff in the woods. Now it's time for you to pinkie swear you won't tell mom and dad.
There's a Brainiac. He's not THE Brainiac. However, he's one aspect of Brainiac. Or maybe there's supposed to be a different Brainiac in every universe and they're all cosmically connected, presumably via their brains. Either way, I think this particular Brainiac is the boss Brainiac.
I highly recommend Windows 10 With Mouse + Keyboard Support Edition
It is said the Lord did write upon the sky, "Only the Most Awful shall be cataloged herein." And a wind did come and blow away the words and turn them into a skull. And the writers did fall upon their knees and give thanks, for yea, the Most Awful was good. Thus the lists were born. Read them, sons and daughters, and be strong.