Any hunter born on after Sept. 2, 1972 must complete a hunter education course in order to hunt in Texas. A certification is not required to purchase a license, but hunters must carry proof of completion or a deferral on their person while hunting. These requirements apply to non-resident hunters, as well, although Texas does recognize out-of-state courses. Hunters as young 9 years-old can complete the hunter education course. Hunters under the age of 17 must complete either a classroom course or an online class along with a field course. If you're over 17, you have the option of completing the entire course online. Check the TPWD Education Registration System to find appropriate courses.
Check out these Jbsa Ft Sam Houston, TX Hunting resources:
