In the summer of 1884, the first school in the vicinity was started in a log church[2] in Greenwood Springs, an area that was later included within Garrison town limits.

The insurance had expired, but with the help of friendly Texas legislators, state taxes were remitted to the town "for several years to allow for rebuilding".

[4] A 1958 study said of the high school, "Records show that about 65 percent of the students are transported by bus from the rural areas surrounding the town.

"[5]: 5 The 1958 study also examined reasons that 46 students dropped out of Garrison High School from 1947 to 1957, including financial, personal, and school-related factors.

[7] Construction of new facilities, including a new gym and space for fine arts, has been slowed by supply chain problems, but is expected to be completed by May 2023.

[8] Garrison offers general education courses, as well as honors and dual credit courses, and classes in agricultural, manufacturing, welding, business and information technologies, finance, fine arts, health sciences, Spanish, and physical education.

[12] The Garrison Bulldogs compete in these sports:[13] The football team won the 2A/D2 state title in 2003.