Centennial School

Centennial School operates as a rural-scale combined-grade school in SAN LUIS, Colorado, run under Centennial School District No. R-1. Current enrollment sits at 186 students spanning grades pre-K through 12. That puts it 64% below the typical public school in Colorado, which averages around 523 students.

Operationally, Centennial School answers to Centennial School District No. R-1, which sets policy, hires staff, and reports enrollment to the state.

In terms of who attends, Centennial School logs that nearly all students (82%) are Hispanic. The remainder breaks down as 18% White. The wider county runs roughly 55% Hispanic, putting the school's mix visibly more Hispanic than the area baseline.

On the resource side, Centennial School lists 15 full-time-equivalent teachers, putting the student-to-teacher ratio at about 12.2:1. Statewide, the average ratio sits near 14.3:1, putting Centennial School tighter than the state norm the norm. Roughly 91% of students at Centennial School qualify for free or reduced-price lunch, often used as a Title I proxy.

With demographic context factored in, Centennial School tracks the demographic baseline. The model predicts 11.3% given the school's FRL share; actual proficiency is 16.4%.

In the broader community, ACS estimates for Costilla County put median household earnings sit near $36,861, 25% of adults hold a bachelor's degree or higher, and census figures put the poverty rate at about 20%. In all, Costilla County runs 2 public schools (combined enrollment of about 493 students), of which Centennial School is one.

Sierra Grande K-12 School is the nearest neighboring public school, about 15.4 miles from this campus. On composite proficiency, Centennial School comes 7th of 7 in the immediate cluster, beneath the nearby-schools average of 40.6%.

The school occupies a countryside site.

Five-year trend. Looking back 7 years, enrollment at Centennial School has ticked down 11%, going from 210 students in 2018 to 186 in 2025. The White share of enrollment increased from 3% to 18% over that span. Class-load math has rose: from 10.3:1 in 2018 to 12.2:1 in 2025.

On the community side, the page collects discussion, questions, and updates around science fair prep, picture-day reminders, and bus-route questions. Posting is open to anyone connected to the school.