Enrollment
39
California · 2024-25 NCES data
Elementary school (grades K-5) · Blocksburg, CA
Casterlin Elementary
Federal NCES profile for Casterlin Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063759006365
👥 S:T ratio 22
🌟 Gifted program 70
🎓 Counselors 61
📋 Attendance 10
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Casterlin Elementary earns 41/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the smallest schools in California.
- 41
- Resource Index · Typical
- 19.5:1
- students per teacher
- 78.6%
- free-lunch eligible
- 39
- students enrolled
Casterlin Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
School address
District: Southern Humboldt Joint Unified · California
NCES ID 063759006365 Verify on NCES CCD record →
Teachers (FTE)
2.0
Federal CCD staff survey
Students per teacher
19.5:1
vs 21.5:1 California avg
-9% vs state
Free-lunch eligible
78.6%
vs 55.5% California avg
+42% vs state
Student-teacher ratio in context
How Casterlin Elementary compares with California and U.S. medians
What stands out at Casterlin Elementary
Casterlin Elementary is a high-poverty, small elementary school in Blocksburg, California, enrolling 39 students.
Class sizes run a bit leaner than typical: 19.5:1 puts it in the smaller third of California schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 78.6% of students eligible for free meals.
This is a small campus: fewer students than 95% of California schools, with 39 enrolled.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Against 123 statewide peers matched on enrollment and economic need, it ranks mid-pack at #67.
Its student body is led by White (49%) and Two or More (23%), more mixed than most schools in the state (diversity index 66/100).
Counselor coverage is strong, about 195 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 35.9% 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 Elementary.
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 Elementary compares
Casterlin Elementary on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 19.5:1 | ▼ 9% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 78.6% | ▲ 42% | 55.5% | 51.7% |
| Enrollment | 39 | top 95% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
19.5:1
Leaner classes than 18% of US schools, heavier class loads than most.
39
Bigger than 5% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
78.6%
free-lunch eligible
- 42% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
19.5:1
students per teacher
- 9% below state mean
Top 31% in California - lower ratio than 69% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
35.9%
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 48.7%
Two or More 23.1%
Hispanic or Latino 20.5%
American Indian / Alaska Native 7.7%
Largest group: White at 48.7% of enrollment.
Student-body diversity index 66.2/100
Simpson diversity index - at 66.2, Casterlin Elementary is more mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Southern Humboldt Joint Unified, which includes Casterlin Elementary.
$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 Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Redway Elementary | Larger | Lower economic need | Higher S:T ratio |
| South Fork High | Larger | Lower economic need | Lower S:T ratio |
| Miranda Junior High | Larger | Lower economic need | Lower S:T ratio |
| Whitethorn Elementary | Smaller | Similar economic need | Lower S:T ratio |
| Osprey Learning Center | Smaller | No free-lunch data | No ratio data |
Comparisons are relative to Casterlin Elementary'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
- 16
- Students per teacher
- 8:1
- Resource Index
- 49/100
- Enrollment
- 9
- Students per teacher
- -
- Resource Index
- 57/100
Similar elementary 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 (~39 students)
Similar student-teacher ratio (~19.5:1)
Next steps
Verify locally before acting on Casterlin Elementary's federal record.
- Compare Casterlin Elementary 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 Elementary
How many students attend Casterlin Elementary?
Casterlin Elementary has 39 students enrolled. It is an elementary school in Blocksburg, CA.
What is the student-teacher ratio at Casterlin Elementary?
The student-teacher ratio at Casterlin Elementary is 19.5:1, which is 9% lower than the California average of 21.5:1 and 24% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Casterlin Elementary?
78.6% of students at Casterlin Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Casterlin Elementary?
The largest demographic group at Casterlin Elementary is White at 48.7% of enrollment, in Blocksburg, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 66.2/100.
What is the Resource Investment Index for Casterlin Elementary?
Casterlin Elementary has a Resource Investment Index of 41/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
Is Casterlin Elementary a good school?
Casterlin Elementary earns 41/100 on the Resource Investment Index, with class sizes near the California median. 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 Elementary, 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.