California Code, Penal Code - PEN § 243.5

(a) When a person commits an assault or battery on school property during hours when school activities are being conducted, a peace officer may, without a warrant, notwithstanding paragraph (2) or (3) of subdivision (a) of Section 836, arrest the person who commits the assault or battery:

(b) “School,” as used in this section, means any elementary school, junior high school, four-year high school, senior high school, adult school or any branch thereof, opportunity school, continuation high school, regional occupational center, evening high school, technical school, or community college.