Enrollment
4
California · 2024-25 NCES data
High school (grades 9-12) · Blocksburg, CA
Casterlin High
Federal NCES profile for Casterlin High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 53/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063759014493
👥 S:T ratio 92
📚 AP courses 10
🌟 Gifted program 30
🎓 Counselors 96
📋 Attendance 38
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Casterlin High earns 53/100 on the Resource Investment Index, with class sizes smaller than 99% of California schools. It is also one of the smallest schools in California.
- 53
- Resource Index · Higher
- 2:1
- small classes for California
- 4
- students enrolled
Casterlin High has class sizes smaller than 99% of California schools. Computed live against every California school reporting to NCES.
School address
District: Southern Humboldt Joint Unified · California
NCES ID 063759014493 Verify on NCES CCD record →
Teachers (FTE)
2.0
Federal CCD staff survey
Students per teacher
2:1
vs 21.5:1 California avg
-91% vs state
Student-teacher ratio in context
How Casterlin High compares with California and U.S. medians
What stands out at Casterlin High
Casterlin High is a small high school in Blocksburg, California, enrolling 4 students.
Classes run notably small here: at 2:1, Casterlin High is leaner than roughly 99% of California schools and 91% under the state's 21.5:1 norm, more adult attention per pupil than most peers.
This is a small campus: fewer students than 99% of California schools, with 4 enrolled.
Its Resource Investment Index outscores 98% of the 9,998 California schools with a score on record, a top-tier result on this measure.
Its student body is led by White (50%) and Two or More (50%) (diversity index 50/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage is strong, about 20 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 25.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Southern Humboldt Joint Unified also operates Redway Elementary (272 students) and South Fork High (211 students) alongside Casterlin 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 Casterlin High compares
Casterlin High on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 2:1 | ▼ 91% | 21.5:1 | 15.7:1 |
| Enrollment | 4 | top 99% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
2:1
Leaner classes than 100% of US schools, among the more generously staffed nationally.
4
Bigger than 1% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Staffing depth
2:1
students per teacher
- 91% below state mean
Top 1% in California - lower ratio than 100% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
25.0%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$16,608
per pupil, district-wide
- above California avg of $16,509
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors0.2 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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 50.0%
Two or More 50.0%
Largest group: Two or More at 50.0% of enrollment.
Student-body diversity index 50.0/100
Simpson diversity index - at 50.0, Casterlin High is more mixed than the California school average of 46.0.
Programs
AP program Not offered
Funding & spending
District-wide per-pupil expenditure for Southern Humboldt Joint Unified, which includes Casterlin High.
$16,608
Per student
+1%
vs California
Avg $16,509
+0%
vs U.S.
Avg $16,593
Revenue mix
Local 44.3%
State 43.7%
Federal 12.0%
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 Casterlin High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Redway Elementary | Larger | No free-lunch data | Higher S:T ratio |
| South Fork High | Larger | No free-lunch data | Higher S:T ratio |
| Miranda Junior High | Larger | No free-lunch data | Higher S:T ratio |
| Casterlin Elementary | Larger | No free-lunch data | Higher S:T ratio |
| Whitethorn Elementary | Larger | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Casterlin High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 272
- Students per teacher
- 22.7:1
- Resource Index
- 13/100
- Enrollment
- 211
- Students per teacher
- 14.1:1
- Resource Index
- 39/100
- Enrollment
- 88
- Students per teacher
- 17.6:1
- Resource Index
- 15/100
- Enrollment
- 39
- Students per teacher
- 19.5:1
- Resource Index
- 41/100
- Enrollment
- 16
- Students per teacher
- 8:1
- Resource Index
- 49/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~4 students)
Similar student-teacher ratio (~2:1)
Next steps
Verify locally before acting on Casterlin High's federal record.
- Compare Casterlin High against another school. Compare schools
- Southern Humboldt Joint Unified'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 Casterlin High
How many students attend Casterlin High?
Casterlin High has 4 students enrolled. It is a high school in Blocksburg, CA.
What is the student-teacher ratio at Casterlin High?
The student-teacher ratio at Casterlin High is 2:1, which is 91% lower than the California average of 21.5:1 and 87% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Casterlin High?
The largest demographic group at Casterlin High is Two or More at 50.0% of enrollment, in Blocksburg, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 50.0/100.
What is the Resource Investment Index for Casterlin High?
Casterlin High has a Resource Investment Index of 53/100 (higher 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).
Is Casterlin High a good school?
Casterlin High earns 53/100 on the Resource Investment Index, with class sizes smaller than 99% of California schools. It is also one of the smallest schools in California. 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 Southern Humboldt Joint Unified?
Besides Casterlin High, Southern Humboldt Joint Unified also operates Redway Elementary (272 students), South Fork High (211 students), and Miranda Junior High (88 students). See the Southern Humboldt Joint Unified 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.