; and (B) encompasses a range of systemic and individualized positive strategies to reinforce desired behaviors, diminish reoccurrence of challenging behaviors, and teach appropriate behaviors to students. (9) Protection and advocacy system The term protection and advocacy system means a protection and advocacy system established under section 143 of the Developmental Disabilities Assistance and Bill of Rights Act of 2000 ( 42 U.S.C. 15043 ). (10) School The term school means— (A) an elementary school or secondary school; or (B) an entity that— (i) provides elementary and secondary education; and (ii) receives, or serves students who receive, support in any form from any program supported, in whole or in part, with Federal funds. (11) School personnel The term school personnel means individuals who are employed by a school, or who perform services for a school on a contractual basis as— (A) school leaders; (B) teachers; (C) specialized instructional support personnel; (D) paraprofessionals; or (E) other staff. (12) School resource officer The term school resource officer means a sworn law enforcement officer who is— (A) assigned by the employing police department to a local educational agency or school; (B) contracting with a local educational agency or school