"We know this is new for schools because the powers haven't been set out in law before, so we want to do everything we can to help them get it right," she said.
"While there are some limits on how far school staff can go in searching a student or their property, schools will always be able to call in police where they have serious concerns."
All schools had been contacted to advise them the new guidelines were available and urged teachers to read them, she said.