Translation of Senkrechte

It would be an advantage if you could send it via DHL, UPS or another Currier, because the parcel was lost once when we sent it with regular mail. Please send me a reference number after you send it.
Once you've put it online, I'd like to check the text for eventual inconsistencies. Let me know how it goes. So that I can review it as well. Let us be in touch towards our next study session. I will be there on Wednesday.
Your German is very good. Of course, there are some mistakes here and there, but I think that all the students have some. Get yourself up and study a lot, that's the secret to success. Good luck.