Texas Education Code - EDUC § 22.053. School District Volunteers

(a) A volunteer who is serving as a direct service volunteer of a school district is immune from civil liability to the same extent as a professional employee of a school district under Section 22.0511.

(b) In this section, “volunteer” means a person providing services for or on behalf of a school district, on the premises of the district or at a school-sponsored or school-related activity on or off school property, who does not receive compensation in excess of reimbursement for expenses.

(c) This section does not limit the liability of a person for intentional misconduct or gross negligence.