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SCHOOL COMMUNITY·RIO GRANDE CITY GRULLA ISD·NCES 483714012124

Grulla High School

6884 E HWY 83, RIO GRANDE CITY, TX 78582 · (956) 370-4294 · Starr County
GRADES 08–12HIGH41-RURALTITLE IREGULAR SCHOOL716 STUDENTS
C+
allk12 Grade
Scored higher than 36% of Texas public high schools
  • CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
  • B+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
  • FThree-year trend Change in reading and math proficiency over the last three test years.

Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Texas public high schools

Enrollment
716
High
DISTRICT 939 · STATE 796
Student : Teacher
13.3:1
54 FTE teachers
DISTRICT 13.1:1 · STATE 15.1:1
Free / Reduced Lunch
97%
693 students
DISTRICT 97% · STATE 65%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 918526%
Grade 1019327%
Grade 1118125%
Grade 1215722%
Student demographics
0%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 1% · STATE 63% · US 70%
White
10%
DISTRICT 0% · STATE 24% · US 43%
Hispanic
715100%
DISTRICT 100% · STATE 54% · US 30%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
37152%
Female
34548%

Discussions

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Test scores

STAAR 2025-26 . % Meets Grade Level or Above
Reading
31.0%
TX avg 54.5% . -1.0pp since 2020
Mathematics
44.0%
TX avg 45.3% . +38.0pp since 2020

What this means: On the STAAR, Texas's statewide test, about 31 of every 100 students at this school read at grade level and about 44 of 100 do math at grade level. Across all Texas schools, those numbers are about 55 and 45. Reading scores are down about 1 points since 2020, while math scores are up about 38 points.

Performance levels, 2025-26

SubjectMasters Grade LevelMeets Grade LevelApproaches Grade LevelDid Not Meet Grade Level
Reading3.0%28.0%24.0%45.0%
Mathematics21.0%23.0%29.0%27.0%
Share of tested students at each STAAR level. Each student counts in one level, so a row adds to about 100%.

STAAR results by year

School yearReadingMathematics
2025-2631.0%44.0%
2024-2528.0%73.0%
2023-2432.0%41.0%
2022-2327.0%77.0%
2021-2225.0%52.0%
2020-2132.0%6.0%
% Meets Grade Level or Above, all students and all tested grades.
Source: STAAR. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
44.7%
composite math + reading, all grades
Predicted
32.4%
based on TX schools with similar FRL share
Beats by
+12.3pp
above demographic expectation

What this means: About 45% of students here test proficient in math and reading, compared with the roughly 32% typical for Texas 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 Texas'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 →

Schools most like Grulla High School

Grulla High School's state test result (44.7% proficient) is higher than 1 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
Grulla High School this school71696.8%44.7%
IDEA College Preparatory Alamo
ALAMO
73795.8%45.3%
IDEA College Prep
DONNA
82395.3%40.9%
IDEA Riverview College Preparatory
BROWNSVILLE
81394.3%64.0%
IDEA College Preparatory Pharr
PHARR
84894.0%49.3%
Psja Thomas Jefferson T-STEM Early College High School
PHARR
55395.5%74.5%
Matched among Texas high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.

Where Grulla High School ranks

Among high schools
MeasureThis schoolIn TexasIn Starr County
State test proficiency
ranked highest first
44.7%#1,006 of 1,385N/A
Math proficiency
ranked highest first
44.0%#711 of 1,425
▼ 621
N/A
Reading proficiency
ranked highest first
31.0%#1,374 of 1,425
▼ 8
N/A
3-year test score change
ranked biggest drop first
-14.5pp#19 of 1,184N/A
Enrollment
ranked largest first
716#739 of 2,107#3 of 7
Students per teacher
ranked fewest first
13.3:1#442 of 1,344N/A
Diversity index
ranked most diverse first
0.3%#1,341 of 1,346N/A
Free and reduced lunch
ranked highest share first
96.8%#38 of 1,522N/A
Enrollment change since 2017-18
ranked steepest decline first
-23.3%#84 of 557N/A
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
716
-73 (-9%) vs 2020
-26% since 2010-11, when it was 963
Student : Teacher
13.3:1
was 12.3:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-257165413.3:197% (693)
2023-2477054.414.2:1100% (767)
2022-2376158.713.0:197% (738)
2020-217896412.3:195% (753)
2017-1893377.912.0:194% (875)
2015-161,0569411.2:189% (940)
2010-119637812.3:181% (783)
Source: NCES Common Core of Data. Rows are the federal collections on file for Grulla High School.

Since 2017-18: students down 23% (933 to 716); teachers down 31% (77.9 to 54).

About Grulla High School

Located in RIO GRANDE CITY, Texas, Grulla High School is a mid-sized high school. It teaches 716 students in grades 8 through 12.

Grulla High School is one of the 15 schools that make up RIO GRANDE CITY GRULLA ISD (9,316 students in total).

Hispanic students are 100% of those enrolled at Grulla High School. That is in line with Starr County, where about 97% of residents are Hispanic. On a 0 to 100 scale, the school's diversity index is 0, compared with 70 nationally.

Grulla High School lists 54 full-time-equivalent teachers; that is about 13.3 students per teacher. By comparison, the average for high schools in Texas is 15.1:1. About 97% of students at Grulla High School are eligible for free or reduced-price lunch.

On the allk12 Grade, Grulla High School lands at C+, ahead of 36% of Texas public high schools.

Grulla High School is 12.3 points above its predicted average proficiency rate across its state test results (44.7% versus 32.4%), which places it in neither the top nor the bottom 10% in Texas.

Starr County is the school's county. There, median household income comes to about $37,639, the share of adults with a bachelor's degree or higher is 14%, and roughly 31% of residents are in poverty. There are 29 public schools in the county, enrolling about 16,900, Grulla High School among them.

Of the public schools around it, Grulla High School is closest to Alto Bonito Elementary School, about 1.8 miles away. Inside a five-mile radius, there are 4 other public schools. Compared with its nearest neighbors, Grulla High School ranks 4th of 9 on average proficiency.

The school's federal locale classification is Rural: Fringe.

In 2024-25, the school enrolled 716, down from 789 in 2020-21.

Use the discussion section to ask about homework, tutoring, and testing dates at Grulla High School. You can also rate the school on this page.

Starr County at a glance

View full county profile
Population
66,067
Census ACS
Median income
$37,639
Household, ACS
Bachelor's+
14%
Adults 25+
Poverty rate
31%
Below federal line
Schools in county
29
16,900 students

Quick facts

School name
Grulla High School
District
RIO GRANDE CITY GRULLA ISD
Address
6884 E HWY 83, RIO GRANDE CITY, TX 78582
Phone
(956) 370-4294
County
Starr County
Level
High
Grade range
08–12
Total enrollment
716
Teachers (FTE)
54
Student–teacher ratio
13.3:1
Free and reduced lunch
693 (97%)
Locale
41-Rural: Fringe
NCES ID
483714012124
Charter school
No
Virtual school
No

Related schools

Other schools in RIO GRANDE CITY GRULLA ISD
Other schools in RIO GRANDE CITY
Nearby schools

Frequently asked questions

About Grulla High School
What is the total enrollment at Grulla High School?
Grulla High School enrolls approximately 716 students in grades 08-12.
What age range does Grulla High School serve?
Grulla High School serves students from grade 08 through grade 12.
What is the student-teacher ratio at Grulla High School?
The student-to-teacher ratio at Grulla High School is approximately 13.3:1 (54 FTE teachers).
What is the racial breakdown of students at Grulla High School?
At Grulla High School, the student body is approximately 0% White, 100% Hispanic.
Is Grulla High School public or private?
Grulla High School is a public K-12 school, overseen by RIO GRANDE CITY GRULLA ISD.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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