Hey Dan,
I'm gonna give your second story a shot b/c I kinda liked the first one. Here goes:
1. top of Page 1, you say is sat, I'd go with sits in a classroom with the rest of her piers.
2. Try to avoid using is or is (word)ing (like is going or is walking) etc. Go with the active verb, not the passive one).
3. handing back a collection of marked essays back to them YOU USE BACK TWICE.
wow lots of errors in this one. I hope it gets better.
4. Jenna (to herself) should be
Jenna
(to herself) or (V.O)
5.Jenna is stood should be Jenna stands.
6. page 3, so she steals a book? that's an offense that she can get expelled for.
7. You say is sat an awful lot. I see that a lot from English as second language. I think you''re better off just saying she sits.
8 If her attitude is that bad, how the hell did she make it into the college and how is she still in school? I don't think I've ever met anyone with so bad an attitude. I think you have it amped up a bit too high.
9. page 4, you say she see's Aristotle, it should be sees.
10. I know you have her say a lot of foreign sounding words, but, at no point do you suggest she speaks with an accent. You want to say that at the beginning, unless I missed it.
11. SPOILERS
Him showing up was pretty damn funny. I think you could have carried that out more. I mean, if he sees a car driving, it might be a dragon to him. Have fun with that scene, make it classic!
12. I just realized that she's writing a philosophy paper, I know you said that earlier, then you should say at the beginning that she's in philosophy class. You do know, it's pretty damn hard to fail that class. I mean, really hard. I got an A and I didn't know jack...
13. ummm you might want to have someone clean up his barf.... just saying....
There are lots of problems, far too many for me to list. You use the word is as a verb far far far too often.
Overall, I thought the story was funny. It was cute, kinda had a Bill and Ted's excellent adventure feel to it. If you don't know it, google it.
I don't know what her passing philosophy has anything to do with her life, but, perhaps you should show a 10 years later where she is...
Good points, it was funny. I laughed a few times.
Bad points, the tense issues, very cliched. How does one fail philosophy? If she's failing that, I can't imagine she's passing any class. And he didn't help her in any other classes.
And seriously, who's gonna clean up the puke?

And how would her mum not know anyone else was in her house? And why is it Jenna's house, wouldn't it be her mum's house? Kinda confused by that.
Good luck with it, I'd read a new fixed up version.
Dan