720 ILCS 5/21.2-4: Sentence.

A person convicted of violation of this Article commits a Class C misdemeanor for the first offense and for a second or subsequent offense commits a Class B misdemeanor. If the interference with the public institution of education is accompanied by a threat of personal injury or property damage, the person commits a Class 3 felony and may be sentenced to a term of imprisonment of not less than 2 years and not more than 10 years and may be prosecuted for intimidation in accordance with Section 12-6 of this Code.