When I was a makeup artist student, we were told we would get a 20% discount at MAC and we just had to show them our student ID, other picture ID and a letter from the school stating we were makeup artist students (with our start and finish dates). Then we were entered in the computer at MAC so our purchases would be discounted 20%.
We didn't get a 'kit'... its just about the discount.
Ask at your school what the procedure is. The school I went to is well known to MAC where I am.