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
Enrollment
168
Student-Teacher
16.8:1
Score
6.5
Grades
9th – 12th
Enrollment
168
Student-Teacher
16.8:1
Score
6.5
Grades
9th – 12th
Updated
2022-23
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 metricsView breakdown
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Calvin Nelms H S — Students at Calvin Nelms H S score 64% proficient, which is below what's typical for similar communities (expected: 69%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
0.2%
Students qualifying for federal meal assistance
Test Scores TX EDFACTS (2020-21)
Based on 4 test records from TX state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
* 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.
Performance Trends
Math proficiency has declined from 64.5% (2019) to 44.5% (2021). Reading/ELA proficiency has improved from 74.5% (2019) to 84.5% (2021).
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.
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
- Phone
- (281) 398-8031
- Data Year
- 2023–2024
Resources & Links
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 methodologyRelated reading
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