Amends the School Code. In provisions concerning a school board's suspension or expulsion of pupils, provides that a student who is determined to have initiated sexual activity with another individual without that individual's consent, a sexual assault, or an attempted sexual assault at a school, a school-sponsored activity or event, or an activity or event that bears a reasonable relationship to school shall be expelled for a period of not less than one year. Provides that (i) a student initiates sexual activity with another individual without that individual's consent if the student uses force or a threat of force to make the other individual perform a nonconsensual sexual act; (ii) a student initiates a sexual assault if the student commits an act of sexual penetration and uses force or a threat of force; and (iii) a student initiates an attempted sexual assault if, with the intent to commit a sexual assault, the student commits an act that constitutes a substantial step toward the commission of a sexual assault. Allows the expulsion requirement to be modified by the superintendent of the school district and the superintendent's determination to be modified by the school board on a case-by-case basis. Provides that the expulsion shall be construed in a manner consistent with the federal Individuals with Disabilities Education Act and a student who is subject to expulsion may be eligible for a transfer to an alternative school program. Effective immediately.