Killeen ISD is set to offer FREE COVID-19 vaccinations. Central Texas largest school district, Killeen ISD is gearing up to offer free COVID-19 vaccinations to anyone 12 or older. Those who are interested has three days to participate. The district has teamed up with McLane Children’s Hospital to provide the Pfizer vaccine on Tuesday from noon to 6:30pm at the at the former Nolan Middle School at 505 East Jasper Rd, then Wednesday from noon to 6:30 pm at the KISD Career Center at 1320 Stagecoach Rd., and then again Thursday at Harker Heights Elementary at 726 South Ann Blvd. in Harker Heights from 1pm to 6:30pm.