I hear that it is done all the time for expediency, whether it complies with official education laws/policies or not. Sometimes it helps when the parents make a fuss. It also makes a difference why you were excluded. Did you miss a deadline for requesting particular classes? Were your scores lower in previous administrations or have you received relatively lower grades in the past? As for high school credit, in our area it is predicated on a sufficiently high score on the year-end high school exam.