How annoying!

I’d sure be miffed at spending my money on a class just to be a captive audience for someone’s MLM pitch.

Still if you’re thinking of going legal, learn more here – installment loans no credit check, I’d probably either talk with the girl or complain to the teacher. While I’d not want my learning experience tainted, I wouldn’t want to get her in too much trouble (since I look at her as ignorant).
So I’d give her a chance to do the right thing. I might print out the school rules on business promotion and have a heart to heart with her in a kind way. It might be all that’s needed. Or all the classmates could complain to the teacher and let her do the heart to heart. Only then if the MLM speak didn’t stop would I go to the school administrators.

My take on it. Hope it gets resolved for you soon.