Enrollment
251
Missouri · 2024-25 NCES data
High school (grades 9-12) · Center, MO
Mark Twain Sr. High
Federal NCES profile for Mark Twain Sr. High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 292571001510
👥 S:T ratio 44
📚 AP courses 10
🌟 Gifted program 70
🎓 Counselors 50
📋 Attendance 54
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mark Twain Sr. High earns 46/100 on the Resource Investment Index, with class sizes near the Missouri median.
- #3 of 3
- public schools in Center · Resource Index
- 46
- Resource Index · Typical
- 13.9:1
- students per teacher
- 27.6%
- free-lunch eligible
Mark Twain Sr. High has class sizes near the Missouri median. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Mark Twain Sr. High ranks #3 of 3 public schools in Center, MO.
School address
District: Ralls Co. R-Ii · Missouri
NCES ID 292571001510 Verify on NCES CCD record →
Teachers (FTE)
18.0
Federal CCD staff survey
Students per teacher
13.9:1
vs 12.8:1 Missouri avg
+9% vs state
Free-lunch eligible
27.6%
vs 46.1% Missouri avg
-40% vs state
Student-teacher ratio in context
How Mark Twain Sr. High compares with Missouri and U.S. medians
What stands out at Mark Twain Sr. High
Mark Twain Sr. High is a mid-sized high school in Center, Missouri, enrolling 251 students.
Class loads run somewhat heavier than typical: 13.9:1 puts it in the larger third of Missouri schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 27.6% of students eligible for free meals.
With 251 students, its enrollment sits close to the Missouri median campus size.
Its Resource Investment Index lands in the upper third of 2,313 scored Missouri schools.
Against 353 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #111.
Its student body is predominantly White (94% of enrollment) (diversity index 12/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage runs a bit thin, about 251 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance runs somewhat below the norm, with 18.3% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Ralls Co. R-Ii spends $10,317 per pupil, 20% below the Missouri average, a leaner-resourced district than most.
Its district draws 18.3% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Ralls Co. R-Ii also operates Ralls County Elementary (355 students) and Mark Twain Jr. High (194 students) alongside Mark Twain Sr. High.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Mark Twain Sr. High compares
Mark Twain Sr. High on the metrics families compare, against Missouri and U.S. means.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.9:1 | ▲ 9% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 27.6% | ▼ 40% | 46.1% | 51.7% |
| Enrollment | 251 | top 61% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.9:1
Leaner classes than 58% of US schools, a middle-of-the-pack class size.
251
Bigger than 25% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
27.6%
free-lunch eligible
- 40% below the Missouri average of 46.1%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
13.9:1
students per teacher
- 9% above state mean
Top 68% in Missouri - lower ratio than 32% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
18.3%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$10,317
per pupil, district-wide
- below Missouri avg of $12,931
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 251 students, the combined health-and-guidance staffing load for this school.
Discipline context
26
in-school suspensions + 9 out-of-school
Suspension rate: 10.4 per 100 students. Combined in-school and out-of-school rate: 13.9 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 94.0%
African American 2.0%
Hispanic or Latino 2.0%
Two or More 1.6%
Asian 0.4%
Largest group: White at 94.0% of enrollment.
Student-body diversity index 11.5/100
Simpson diversity index - at 11.5, Mark Twain Sr. High is less mixed than the Missouri school average of 31.0.
Programs
AP program Not offered
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Ralls Co. R-Ii, which includes Mark Twain Sr. High.
$10,317
Per student
-20%
vs Missouri
Avg $12,931
-38%
vs U.S.
Avg $16,593
Revenue mix
Local 55.0%
State 26.7%
Federal 18.3%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Mark Twain Sr. High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Ralls County Elementary | Larger | Similar economic need | Lower S:T ratio |
| Mark Twain Jr. High | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Mark Twain Sr. High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 355
- Students per teacher
- 11.8:1
- Resource Index
- 58/100
- Enrollment
- 194
- Students per teacher
- 16.2:1
- Resource Index
- 58/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Missouri, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~251 students)
Similar student-teacher ratio (~13.9:1)
Next steps
Verify locally before acting on Mark Twain Sr. High's federal record.
- Compare Mark Twain Sr. High against another school. Compare schools
- Ralls Co. R-Ii's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Mark Twain Sr. High
How many students attend Mark Twain Sr. High?
Mark Twain Sr. High has 251 students enrolled. It is a high school in Center, MO.
What is the student-teacher ratio at Mark Twain Sr. High?
The student-teacher ratio at Mark Twain Sr. High is 13.9:1, which is 9% higher than the Missouri average of 12.8:1 and 11% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Mark Twain Sr. High?
27.6% of students at Mark Twain Sr. High are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Mark Twain Sr. High?
The largest demographic group at Mark Twain Sr. High is White at 94.0% of enrollment, in Center, MO.
What is the Resource Investment Index for Mark Twain Sr. High?
Mark Twain Sr. High has a Resource Investment Index of 46/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mark Twain Sr. High rank among public schools in Center?
By Resource Investment Index, Mark Twain Sr. High ranks #3 of 3 public schools in Center, MO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Center on the city page.
Is Mark Twain Sr. High a good school?
Mark Twain Sr. High earns 46/100 on the Resource Investment Index, with class sizes near the Missouri median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Ralls Co. R-Ii?
Besides Mark Twain Sr. High, Ralls Co. R-Ii also operates Ralls County Elementary (355 students) and Mark Twain Jr. High (194 students). See the Ralls Co. R-Ii district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.