509.09 IMPROPER CONDUCT IN SCHOOLS.
   (a)   No person shall purposely and maliciously injure or deface a schoolhouse or other school building, its fixtures, books, or appurtenances, or commit a trespass or a nuisance or loiter therein; or purposely and maliciously commit trespass or loiter upon the enclosed grounds attached thereto or fixtures placed thereon, or upon an enclosure, sidewalk, driveway, or parking lot appurtenant thereto.
   (b)   No person shall purposely and maliciously assault, strike, threaten, or menace a teacher or other person in charge of a class or assemblage of students, or any employee of a school while in the performance of his duties, or disrupt, disturb or interfere with the teaching of any class of students or any activity conducted in a school or grounds thereof or in any public place.
   (c)   No person shall purposely and maliciously assault, strike, threaten, menace, follow, pursue, or lay hands upon a student or other person in a school, school building, or the grounds thereof.
   (d)   No person shall use improper, indecent, or obscene language toward a student, teacher, or other person in charge of a class or assemblage of students, or any employee of a school while in the performance of his duties, or use such language purposely and maliciously in a class or assemblage of students or other persons in a public place or in a school or grounds thereof.
   (e)   Whoever violates subsections (a), (b) or (c) hereof shall be fined not more than one thousand dollars ($1,000) or imprisoned not more than one year, or both. Whoever violates subsection (d) hereof shall be fined not more than three hundred dollars ($300.00) or imprisoned not more than 30 days, or both.
(1980 Code 132.13)