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Average

#3807 of 8,547 schools in TX

Top 45% in state

Calvin Nelms H S

High School · CALVIN NELMS CHARTER SCHOOLS

20625 CLAY RD, Katy, TX 77449

Charter

Enrollment

168

Student-Teacher

16.8:1

Score

6.5

Grades

9th – 12th

Updated 2022-23

How this school compares

In Katy

#63 of 86

public schools

Texas high schools

#935 of 1,699

In district

#1 of 2

CALVIN NELMS CHARTER SCHOOLS

Academic growth

8.0 / 10

Very strong

About Calvin Nelms H S

Calvin Nelms High School serves 168 students in grades 9-12 as a public charter school in Katy, Texas. With 10 full-time equivalent teachers, the school maintains a student-teacher ratio of 16.8:1, allowing for more individualized attention in this smaller learning environment. Academically, Calvin Nelms performs exceptionally well, earning a MySchoolScout rating of 7.5 out of 10 and ranking #1188 out of 8598 Texas schools, placing it in the 86th percentile statewide.

The school demonstrates particular strength in English Language Arts, with 80% of students achieving proficiency or above across grade levels. Math performance shows 54% of students reaching proficiency, indicating solid foundational skills with opportunities for continued growth. Located at 20625 Clay Road in the Harris County portion of Katy, the school serves a stable suburban community where the median household income is $82,300 and median home value is $213,500.

About 30% of neighborhood residents hold bachelor's degrees or higher, and the poverty rate remains relatively low at 10.7%. Calvin Nelms High School operates within this thriving suburban setting, where families value educational achievement and community investment in student success.

What Parents Should Know

With an enrollment of 168 students, Calvin Nelms H S is a smaller school where families often find a close-knit community atmosphere. Smaller settings can mean more individual attention from teachers and staff, though they may offer fewer extracurricular options than larger schools.

Calvin Nelms H S is a charter school — a publicly funded school that operates with more autonomy than traditional district schools. Charter schools often have distinct educational models or specialties. Parents should understand the school's specific mission, enrollment process, and how its approach differs from nearby district options.

Score Breakdown

Full Profile · 4/4 metrics
Student Progress8.0Excellent25%
Year-over-year improvement in student test scores.
View breakdown
Years of Data2
Annual Change-2.5 pts/yr
Data Period2019–2021
TrendDeclining
Academics7.9Very Good25%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency44.5%
Reading/ELA Proficiency84.5%
Overall Proficiency65%
Expected (poverty-adj.)69%
vs. Expected-4.5 pts
Adjusted Percentile69th
College Readiness6.6Above Average30%
Graduation rates, AP course participation, and IB availability.
View breakdown
IB ProgramNo
Resources & Environment2.8Needs Improvement20%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio16.8:1
Per-Pupil Spending$9,566

Calvin Nelms H S — Students at Calvin Nelms H S score 64% proficient, which is below what's typical for similar communities (expected: 69%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

0.2%

Students qualifying for federal meal assistance

Test Scores TX EDFACTS (2020-21)

Math Proficiency 54.5%
School
State
N/A
ELA Proficiency 79.5%
School
State
N/A

Based on 4 test records from TX state assessments. About our data

Proficiency Trend

↓ Declining

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
64.5%
ELA
74.5%
2021*
Math
44.5%
ELA
84.5%

* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.

Source: EdFacts (NCES) and state assessment data. Growth score: 8.0/10.

How Calvin Nelms H S Compares

See how Calvin Nelms H S performs across key quality dimensions compared to state benchmarks.

Overall Score
6.5/10
56th percentile in TX
Academic
7.9/10
7.9/10
Growth
8.0/10
Above average
Environment
2.8/10
Below average

Location

20625 CLAY RD, Katy, TX 77449

Nearby Alternatives

Families considering Calvin Nelms H S may also want to explore other high schools in the area. WESTSIDE BAPTIST ACADEMY (rated 8.3/10, 0.7 miles away), which scores notably higher. Another option is MORTON RANCH EL (rated 8.0/10, 1.6 miles away), which scores notably higher. Additionally, CARDIFF J H (rated 7.7/10, 1.6 miles away), which scores notably higher. For more schools in Katy, see our Katy schools guide .

Nearby Schools

20 within 2.4 mi
School Distance Rating
CALVIN NELMS MIDDLE Katy 0.0 mi 4.7
ROBINSON EL Katy 0.6 mi 6.1
T H MCDONALD J H Katy 0.7 mi 7.5
WESTSIDE BAPTIST ACADEMY Katy 0.7 mi 8.3
LORAINE T GOLBOW EL Katy 0.8 mi 6.4
MCROBERTS EL Katy 0.9 mi 6.0
JACK & SHARON RHOADS EL Katy 1.1 mi 7.4
MORTON RANCH J H Katy 1.5 mi 7.4
FRANZ EL Katy 1.6 mi 6.4
URSULA STEPHENS EL Katy 1.6 mi 7.6
MORTON RANCH EL Katy 1.6 mi 8.0
THORNTON MIDDLE Katy 1.7 mi 6.8
CARDIFF J H Katy 1.6 mi 7.7
MORTON RANCH H S Katy 1.9 mi 7.7
SHERIDAN EL Katy 1.8 mi 6.7
SUNDOWN EL Katy 1.9 mi 6.2
BRITISH INTERNATIONAL SCHOOL OF HOUSTON Katy 2.1 mi 6.3
EMERY EL Katy 2.1 mi 4.8
HEMMENWAY EL Katy 2.3 mi 6.9
MAYDE CREEK J H Houston 2.4 mi 7.3

Neighborhood Census ACS (2019-2023)

Census data for ZIP 77449 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$85,934

Median Home Value

$236,400

Median Rent

$1,755/mo

Population

123,042

College Educated

28.4%

Homeownership

70.5%

Avg Commute

35.6 min

Poverty Rate

11%

Median Age

34.3

Community Profile

The community surrounding Calvin Nelms H S has a median household income of $85,934. It is an area where 28% of adults hold a bachelor's degree or higher. The median home value in the area is $236,400, with a median rent of $1,755/month. The area has a poverty rate of 11.0%. The average commute in the area is 36 minutes, which is above the national average. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
FRANK M TEJEDA ACADEMY San Antonio, TX 6.5
GATEWAY CHARTER ACADEMY - MIDDLE - H S Dallas, TX 6.5
MANOR EXCEL ACADEMY Manor, TX 6.5
MAY H S May, TX 6.5
SKIDMORE-TYNAN H S Skidmore, TX 6.5
THE MARY CATHERINE HARRIS SCHOOL-SCHOOL OF CHOICE Bryan, TX 6.5

Frequently Asked Questions

Common questions about Calvin Nelms H S

What grades does Calvin Nelms H S serve?

Calvin Nelms H S serves students in grades 9th through 12th.

How many students attend Calvin Nelms H S?

Calvin Nelms H S has an enrollment of approximately 168 students.

What is the student-teacher ratio at Calvin Nelms H S?

The student-teacher ratio at Calvin Nelms H S is 16.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.

How does Calvin Nelms H S rank in TX?

Calvin Nelms H S is ranked #3807 out of 8,547 schools in TX.

What is Calvin Nelms H S's MySchoolScout rating?

Calvin Nelms H S has a composite rating of 6.5 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

What are the test scores at Calvin Nelms H S?

Based on the most recent state assessment data, Calvin Nelms H S has 54.5% math proficiency and 79.5% reading/ELA proficiency.

Is Calvin Nelms H S a charter school?

Yes, Calvin Nelms H S is a charter school. Charter schools are publicly funded but independently operated, often with more flexibility in curriculum and teaching methods.

Is Calvin Nelms H S a Title I school?

No, Calvin Nelms H S is not currently a Title I school.

11 schools nearby View map →

Neighborhood Context

City Safety
High (3,484/100K)

FBI UCR 2024. City-level (Katy). Data >1 year old.

Quick Facts NCES CCD (SY 2022-23)

Grades
9th – 12th
Enrollment
168
Student-Teacher Ratio
16.8:1
Teachers (FTE)
10
Type
regular
Setting
Large Suburb
County
Harris County
Data Year
2023–2024

District

CALVIN NELMS CHARTER SCHOOLS
District Enrollment
324
Schools in District
2
Per-Pupil Spending
$9,891
District Rank
#1 of 2

Other Schools in This District

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

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