HOw long does it take a teacher to change a grade in college?

Okay..so i got a B in a class when I should have gotten an A. I had a paper given out on the last day of class that showed my grade which was an A. THe only thing left was some presentation thing, which I got an A in.... Then when I chekced my grade last Tuesday I got a B in the class. SO I emailed her, and she emailed back the next day, and said she made a mistake. She said she would change it ASAP. But its Friday now, and its still not changed...I just chekced. So how long does it take for the grade to be changed usually?HOw long does it take a teacher to change a grade in college?
Your teacher probably put in the correction right away, but the school may not have updated their system yet. Go in person to the records and transcripts department and ask them how long the change takes. Have a COPY of the e-mail from the teacher with you as proof that your grade should be changed, and then they can tell you how long until it is posted correctly.