; and (ii) is assigned by the employing law enforcement agency to a program, who is contracting with a program, or who is employed by a program; and (B) includes an individual referred to as a school resource officer if that individual meets the definition in subparagraph (A). (4) Mechanical restraint The term mechanical restraint means the use of devices as a means of restricting a student’s freedom of movement. (5) Physical escort The term physical escort means the temporary touching or holding of the hand, wrist, arm, shoulder, or back for the purpose of inducing a student who is acting out to walk to a safe location. (6) Physical restraint The term physical restraint means a personal restriction that immobilizes or reduces the ability of an individual to move the individual’s arms, legs, torso, or head freely, except that such term does not include a physical escort, mechanical restraint, or chemical restraint. (7) Positive behavioral interventions and supports The term positive behavioral interventions and supports — (A) means a schoolwide, systematic approach that embeds evidence-based practices and data-driven decision making to improve school climate and culture in order to achieve improved academic and social outcomes and increase learning for all students (including students with the most complex and intensive behavioral needs); and (B) encompasses a range of systemic and individualized positive strategies to teach and reinforce school-expected behaviors, while discouraging and diminishing undesirable behaviors. (8) Program The term program means— (A) all of the operations of a local educational agency, system of vocational education, or other school system; (B) a program that serves children who receive services for which financial assistance is provided in accordance with the Head Start Act ( 42 U.S.C. 9831 et seq. )