CA Educ Code Section 32212

(a)

The Legislature finds and declares that interruption of class time seriously impairs the educational process.

(b)

It is the intent of the Legislature that each governing board of a school district formally address the problem of classroom interruptions and adopt a policy to control those interruptions, consistent with local circumstances and practices.

(c)

The Superintendent of Public Instruction shall develop and distribute to each governing board of a school district a model policy for the reduction and control of classroom interruptions, including, but not limited to, intercom and public address system use.