IC 20-29-2-16: "Strike"

Sec. 16. "Strike" means:

(1) concerted failure to report for duty;

(2) willful absence from one's position;

(3) stoppage of work; or

(4) abstinence in whole or in part from the full, faithful, and proper performance of the duties of employment;

without the lawful approval of the school employer or in any concerted manner interfering with the operation of the school employer for any purpose.