CALVIN NELMS H S

Located at 20625 CLAY RD, in KATY, Texas, CALVIN NELMS H S is a minimally staffed secondary school that works with 183 students (grades 9 through 12), overseen by CALVIN NELMS CHARTER SCHOOLS. Enrollment runs roughly 77% leaner than the state mean of about 796.

Across the 2 schools in CALVIN NELMS CHARTER SCHOOLS (343 students total), CALVIN NELMS H S accounts for its share of the district's footprint.

On demographics, CALVIN NELMS H S logs that Hispanic students make up the majority at 61%. Beyond that, the school shows 16% White, 16% Black, 4% Asian, 4% multiracial. That is meaningfully more Hispanic than the county at large, where the share is closer to 44%.

Looking at school resources, CALVIN NELMS H S logs 10 full-time-equivalent teachers, putting the student-to-teacher ratio at about 17.6:1. That figure is higher than the state norm's 15.1:1 average.

In the area at large, Harris County reports that median household income runs about $74,983, about 34% of the adult population holds a bachelor's degree or above, and the poverty rate sits near 13%. CALVIN NELMS H S is one of 1205 public schools in Harris County (combined enrollment of about 886,911 students).

Nearest neighbor: CALVIN NELMS MIDDLE, around 0.0 miles off. 8 of the 8 nearest public schools sit inside a five-mile radius.

The school occupies a commuter-belt site. CALVIN NELMS H S operates as a public charter school, meaning it is publicly funded but governed independently of the surrounding district's traditional schools.

Trend over the last 7 years. CALVIN NELMS H S's enrollment has expanded 12% since 2018, when it stood at 164 (now 183). White enrollment moved from 27% to 16% across the same window. Class-load math has rose: from 15.3:1 in 2018 to 17.6:1 in 2025.

Within the allk12 community for this school, the page collects discussion, questions, and updates around classroom updates, athletics, and weather closures. The community welcomes input from current and former families.