120.13 (1) (b) The school district administrator or any principal or teacher designated by the school district administrator also may make rules, with the consent of the school board, and may suspend a pupil for not more than 3 5 school days or, if a notice of expulsion hearing has been sent under par. (c) or (e) or s. 119.25, for not more than a total of 15 consecutive school days for noncompliance with such rules or school board rules, or for knowingly conveying any threat or false information concerning an attempt or alleged attempt being made or to be made to destroy any school property by means of explosives, or for conduct by the pupil while at school or while under the supervision of a school authority which endangers the property, health or safety of others, or for conduct while not at school or while not under the supervision of a school authority which endangers the property, health or safety of others at school or under the supervision of a school authority or endangers the property, health or safety of any employe or school board member of the school district in which the pupil is enrolled. Prior to any suspension, the pupil shall be advised of the reason for the proposed suspension. The pupil may be suspended if it is determined that the pupil is guilty of noncompliance with such rule, or of the conduct charged, and that the pupil's suspension is reasonably justified. The parent or guardian of a suspended minor pupil shall be given prompt notice of the suspension and the reason for the suspension. The suspended pupil or the pupil's parent or guardian may, within 5 school days following the commencement of the suspension, have a conference with the school district administrator or his or her designee who shall be someone other than a principal, administrator or teacher in the suspended pupil's school. If the school district administrator or his or her designee finds that the pupil was suspended unfairly or unjustly, or that the suspension was inappropriate, given the nature of the alleged offense, or that the pupil suffered undue consequences or penalties as a result of the suspension, reference to the suspension on the pupil's school record shall be expunged. Such finding shall be made within 15 days of the conference. A pupil suspended under this paragraph shall not be denied the opportunity to take any quarterly, semester or grading period examinations or to complete course work missed during the suspension period, as provided in the attendance policy established under s. 118.16 (4) (a).