Enrollment
307
Combined
STATE 523
SCHOOL COMMUNITY·SIERRA GRANDE SCHOOL DISTRICT NO. R-30·NCES 080414000572
Sierra Grande K-12 School
17523 EAST HIGHWAY 160, BLANCA, CO 81123 · (719) 379-3257 · Costilla County
GRADES PK–12COMBINED43-RURALTITLE IREGULAR SCHOOL307 STUDENTS
Student : Teacher
21.7:1
14 FTE teachers
STATE 14.3:1
Free / Reduced Lunch
79%
243 students
STATE 50%
Community
0
0 members
Enrollment and student:teacher ratio compared against other combined schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Student demographics
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
CMAS 2024-25 . % Met or Exceeded ExpectationsEnglish Language Arts
24.4%
CO avg 44.9% . +5.2pp since 2023
Math
15.4%
CO avg 36.1% . +3.8pp since 2023
What this means: On the CMAS, Colorado's statewide test, about 24 of every 100 students at this school read and write at grade level and about 15 of 100 do math at grade level. Across all Colorado schools, those numbers are about 45 and 36. Reading and writing scores are up about 5 points since 2023, while math scores are up about 4 points.
Source: CMAS. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
25.3%
composite math + reading, all grades
Predicted
18.7%
based on CO schools with similar FRL share
Beats by
+6.6pp
above demographic expectation
What this means: About 25% of students here test proficient in math and reading, compared with the roughly 19% typical for Colorado schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Colorado's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
7-year change
SY 2017-18 vs SY 2024-25Enrollment
307
+19 (+7%) vs 2017
Student : Teacher
21.7:1
was 13.1:1
% White
16%
was 21%
% Hispanic
79%
was 75%
% Black
1%
was 1%
Source: NCES Common Core of Data
About Sierra Grande K-12 School
As a low-enrollment unified-grade school in BLANCA, Colorado, Sierra Grande K-12 School hosts 307 students from grades pre-K through 12, overseen by Sierra Grande School District No. R-30. By comparison, Colorado's public schools average about 523 students each, so Sierra Grande K-12 School sits 41% below that benchmark.
Sierra Grande School District No. R-30 is the operating authority for Sierra Grande K-12 School, handling staffing, calendars, and reporting to the state department of education.
On the student-mix side, Sierra Grande K-12 School shows that 79% of the student body identifies as Hispanic. The remainder looks like 16% White, 4% multiracial. By comparison, Costilla County as a whole is about 55% Hispanic, so the school skews meaningfully more Hispanic than its surroundings.
Looking at the economic backdrop, Staff filings list 14 full-time-equivalent teachers, which works out to roughly 21.7:1 students per teacher. That figure is higher than the state norm's 14.3:1 average. An estimated 79% of students are eligible for free or reduced-price lunch, a commonly cited indicator of low-income enrollment.
On a residual basis (actual vs predicted given the student mix), Sierra Grande K-12 School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 18.7%; this one delivers 25.3%.
In the surrounding community, community-level numbers for Costilla County indicate the typical household earns roughly $36,861 per year, 25% of adults hold a bachelor's degree or higher, and the poverty rate sits near 20%. In all, Costilla County runs 2 public schools (combined enrollment of about 493 students), of which Sierra Grande K-12 School is one.
Nearest neighbor: Centennial School, around 15.4 miles off.
The campus sits in a small-town setting.
Over the past 7-year window. Looking back 7 years, enrollment at Sierra Grande K-12 School has rose 7%, going from 288 students in 2018 to 307 in 2025. Over the same period, the White share contracted from 21% to 16%. The student-to-teacher ratio rose from 13.1:1 in 2018 to 21.7:1 today.
On allk12, members of the Sierra Grande K-12 School community share and discuss open house dates, ride-share offers, and field-trip permission slips. Anyone with firsthand experience at this school can post or comment.
Costilla County at a glance
View full county profilePopulation
3,607
Census ACS
Median income
$36,861
Household, ACS
Bachelor's+
25%
Adults 25+
Poverty rate
20%
Below federal line
Schools in county
2
493 students
Quick facts
Related schools
Nearby schools
- Centennial School15.4 mi · 186
- Alamosa Elementary School 3-523.6 mi · 473
- Alamosa Elementary School K-223.7 mi · 437
- Ortega Middle School23.8 mi · 471
- Alamosa Online23.9 mi · 29
- Alamosa Alternative Education School23.9 mi · 60
Frequently asked questions
About Sierra Grande K-12 SchoolHow many students attend Sierra Grande K-12 School?
Sierra Grande K-12 School enrolls approximately 307 students in grades PK-12.
What grades does Sierra Grande K-12 School serve?
Sierra Grande K-12 School serves grades PK-12.
What is the student-teacher ratio at Sierra Grande K-12 School?
The student-to-teacher ratio at Sierra Grande K-12 School is approximately 21.7:1 (14 FTE teachers).
What is the racial breakdown of students at Sierra Grande K-12 School?
At Sierra Grande K-12 School, the student body is approximately 16% White, 79% Hispanic, 1% Black, 4% Two or more.
Who oversees Sierra Grande K-12 School?
Sierra Grande K-12 School is overseen by Sierra Grande School District No. R-30 in Costilla County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.