The following student conduct shall constitute grounds for long-term suspension, expulsion, or mandatory reassignment, subject to the procedural provisions of the Student Discipline Act, when such activity occurs on school grounds, in a vehicle owned, leased, or contracted by a school being used for a school purpose or in a vehicle being driven for a school purpose by a school employee or by his or her designee, or at a school-sponsored activity or athletic event: (1) Use of violence, force, coercion, threat, intimidation, or similar conduct in a manner that constitutes a substantial interference with school purposes; (2) Willfully causing or attempting to cause substantial damage to property, stealing or attempting to steal property of substantial value, or repeated damage or theft involving property; (3) Causing or attempting to cause personal injury to a school employee, to a school volunteer, or to any student. Personal injury caused by accident, self-defense, or other action undertaken on the reasonable belief that it was necessary to protect some other person shall not constitute a violation of this subdivision; (4) Threatening or intimidating any student for the purpose of or with the intent of obtaining money or anything of value from such student; (5) Knowingly possessing, handling, or transmitting any object or material that is ordinarily or generally considered a weapon; (6) Engaging in the unlawful possession, selling, dispensing, or use of a controlled substance or an imitation controlled substance, as defined in section 28-401, a substance represented to be a controlled substance, or alcoholic liquor as defined in section 53-103.02 or being under the influence of a controlled substance or alcoholic liquor; (7) Public indecency as defined in section 28-806, except that this subdivision shall apply only to students at least twelve years of age but less than nineteen years of age; (8) Engaging in bullying as defined in section 79-2,137;