Mark Twain Sr. High

21622 Hwy 19, Center, MO 63436

BSchola Grade
Grades
9–12
High
Students
251
Enrolled 2024–25
Students per teacher
12 : 1
Full-time teachers
District
Ralls Co. R-II
Ralls County

Schola Grade B · Above average

Letter grade (A–F) · compared with 519 Missouri high schools · How we grade
Test scores48% proficient in math & reading
69thpercentile
Equity40% of low-income students proficient
78thpercentile
Attendance22% chronically absent
36thpercentile
Graduation rate95% graduate in 4 years
72ndpercentile
College readinessAt least 13% take AP, IB or dual-enrollment courses
48thpercentile
Class size12 students per teacher
54thpercentile

Percentiles compare this school with other Missouri high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Mark Twain Sr. High

Mark Twain Sr. High is a public high school in Center, Missouri, serving grades 9–12. It is part of Ralls Co. R-II. The school is located in a remote rural area in Ralls County.

In the 2024–25 school year, 251 students were enrolled, with about 12 students for every full-time teacher. That ratio is close to the typical Missouri high school (11.9 students per teacher). Its Schola Grade is B (above average), compared with 519 Missouri high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

21622 Hwy 19
Center, MO 63436
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
251 students
Students per teacher
12 to 1
Charter school
No
Magnet school
No
Locale
Rural — Remote
School district
Ralls Co. R-II
County
Ralls County
NCES school ID
292571001510

Schools near Mark Twain Sr. High

All 3 schools in Center →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.