(a) Each public and each approved independent school shall adopt and implement a comprehensive plan for responding to student misbehavior. To the extent appropriate, the plan shall promote the positive development of youths. The plan shall include: (6) A description of behaviors on and off school grounds that constitute misconduct, including harassment, bullying, and hazing, particularly those behaviors that may be grounds for expulsion. The plan shall include a description of misconduct as listed in subdivisions 11(a)(26)(A)-(C) and (32) of this title that, although serious, does not rise to the level of harassment or bullying as those terms are defined therein.