Do active shooter drills impact students? The group made recommendations on active shooter drills and proactive school safety solutions. Shelley Potter, president of the San Antonio Alliance of Teachers and Support Personnel, the union that represents San Antonio ISD teachers and employees, said the organization is talking with teachers about lockdown drills and collecting information. Are active shooter drills in schools doing more harm than good? San Antonio ISD said it conducts lockdown drills that are announced and initiated by school administrators.