A studio teacher is a teacher and welfare worker who sees to the education of minors in entertainment, as well as ensuring that the details of their employment do not violate child labor laws. Studio teachers are licensed by the state of California, and must hold at least two teaching credentials (a multiple-subject credential and a single-subject credential in one of the core subjects), as well as complete a twelve-hour course on the relevant laws. Any film or television production shooting in California (or shooting outside California if the production company is based in California and employing Californian actors) is generally required by state law to have a studio teacher on set under the following circumstances:
If there are multiple minors present, multiple studio teachers may be needed; the exact number of minors per studio teacher depends on the age of the minors and whether or not school is in session. In general, one studio teacher is required per ten students on a schoolday, or one studio teacher per twenty students if school is not in sessions. More details are available at the home page of the Studio Teachers Union.