Section 41 of the Sexual Offences Act requires all school staff (teachers, coaches, administrators, groundstaff) to be checked against the Sexual Offences Register. The Childrens Act, section 126, requires all school staff to be checked against the National Child Protection Register.
Both of these registers are based on criminal convictions.
TPN's biometric criminal check provides details on all convictions and cases awaiting trial. And, for your convenience, TPN can arrange biometric capturing at your school.