The following words and phrases when used in this article have the meanings given to them in this section unless the context clearly indicates otherwise.
"Athletic activity" means all the following:
(a) Interscholastic athletics;
(b) An athletic contest or competition that is sponsored by or associated with a school entity, including cheerleading, club-sponsored sports activities, and sports activities sponsored by school-affiliated organizations;
(c) Noncompetitive cheerleading that is sponsored by school-affiliated organizations; and
(d) Practices, interschool practices, and scrimmages for all of the activities described in this section.
"School" means any school under the jurisdiction of a county board of education.