Enrollment
241
California · 2024-25 NCES data
High school (grades 9-12) · San Luis Obispo, CA
Grizzly Challenge Charter
Federal NCES profile for Grizzly Challenge Charter, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 42/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 069103211281Charter school
👥 S:T ratio 26
📚 AP courses 10
🌟 Gifted program 30
🎓 Counselors 76
📋 Attendance 68
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Grizzly Challenge Charter earns 42/100 on the Resource Investment Index, with class sizes smaller than 76% of California schools. It is also less racially and ethnically mixed than most California schools.
- #1 of 3
- high schools in San Luis Obispo · Resource Index
- 42
- Resource Index · Typical
- 18.5:1
- small classes for California
- 69.3%
- free-lunch eligible
Grizzly Challenge Charter has class sizes smaller than 76% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Grizzly Challenge Charter ranks #1 of 3 high schools in San Luis Obispo, CA.
School address
District: San Luis Obispo County Office of Education · California
NCES ID 069103211281 Verify on NCES CCD record →
Teachers (FTE)
13.0
Federal CCD staff survey
Students per teacher
18.5:1
vs 21.5:1 California avg
-14% vs state
Free-lunch eligible
69.3%
vs 55.5% California avg
+25% vs state
Student-teacher ratio in context
How Grizzly Challenge Charter compares with California and U.S. medians
What stands out at Grizzly Challenge Charter
Grizzly Challenge Charter is a higher-need, mid-sized charter high school in San Luis Obispo, California, enrolling 241 students.
Class sizes run a bit leaner than typical: 18.5:1 puts it in the smaller third of California schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 69.3% of students eligible for free meals.
Enrollment of 241 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index outscores 92% of the 9,998 California schools with a score on record, a top-tier result on this measure.
Among 798 similarly sized, similarly resourced-need California schools statewide, it ranks #54, a top-tier result once campus size and economic need are matched.
Its student body is predominantly Hispanic or Latino (89% of enrollment), among the less diverse in the state (diversity index 21/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage is strong, about 121 students per counselor, inside the American School Counselor Association's recommended 250:1.
12.9% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Its district draws 15.5% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among San Luis Obispo's high schools, it stands alongside San Luis Obispo High (1,678 students): Grizzly Challenge Charter is smaller than that campus by headcount and runs leaner classes (18.5:1 vs 21.5:1).
San Luis Obispo County Office of Education also operates San Luis Obispo County Community (76 students) and San Luis County Special Education (17 students) alongside Grizzly Challenge Charter.
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 Grizzly Challenge Charter compares
Grizzly Challenge Charter on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18.5:1 | ▼ 14% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 69.3% | ▲ 25% | 55.5% | 51.7% |
| Enrollment | 241 | top 80% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
18.5:1
Leaner classes than 22% of US schools, heavier class loads than most.
241
Bigger than 24% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
69.3%
free-lunch eligible
- 25% 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
18.5:1
students per teacher
- 14% below state mean
Top 24% in California - lower ratio than 76% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
12.9%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Support staff
Counselors2.0 FTE
Per 121 students, the combined health-and-guidance staffing load for this school.
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
Hispanic or Latino 88.8%
White 6.2%
African American 2.1%
Asian 1.7%
Two or More 1.2%
Largest group: Hispanic or Latino at 88.8% of enrollment.
Student-body diversity index 20.7/100
Simpson diversity index - at 20.7, Grizzly Challenge Charter is less mixed than the California school average of 46.0.
Programs
AP program Not offered
How Grizzly Challenge Charter Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| San Luis Obispo County Community | Smaller | Higher economic need | Similar S:T ratio |
| San Luis County Special Education | Smaller | Higher economic need | Lower S:T ratio |
| San Luis Obispo County Juvenile Court | Smaller | Similar economic need | Lower S:T ratio |
Comparisons are relative to Grizzly Challenge Charter's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 76
- Students per teacher
- 19:1
- Resource Index
- 32/100
- Enrollment
- 17
- Students per teacher
- 4.3:1
- Resource Index
- 68/100
- Enrollment
- 11
- Students per teacher
- 5.5:1
- Resource Index
- 63/100
Similar high schools in San Luis Obispo
2 comparable high schools (grades 9-12) serving the same city.
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 (~241 students)
Next steps
Verify locally before acting on Grizzly Challenge Charter's federal record.
- Compare Grizzly Challenge Charter against another school. Compare schools
- San Luis Obispo County Office of Education'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 Grizzly Challenge Charter
How many students attend Grizzly Challenge Charter?
Grizzly Challenge Charter has 241 students enrolled. It is a high school in San Luis Obispo, CA.
What is the student-teacher ratio at Grizzly Challenge Charter?
The student-teacher ratio at Grizzly Challenge Charter is 18.5:1, which is 14% lower than the California average of 21.5:1 and 18% 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 Grizzly Challenge Charter?
69.3% of students at Grizzly Challenge Charter are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Grizzly Challenge Charter?
The largest demographic group at Grizzly Challenge Charter is Hispanic or Latino at 88.8% of enrollment, in San Luis Obispo, CA.
What is the Resource Investment Index for Grizzly Challenge Charter?
Grizzly Challenge Charter has a Resource Investment Index of 42/100 (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 Grizzly Challenge Charter rank among high schools in San Luis Obispo?
By Resource Investment Index, Grizzly Challenge Charter ranks #1 of 3 high schools in San Luis Obispo, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in San Luis Obispo on the city page.
Is Grizzly Challenge Charter a good school?
Grizzly Challenge Charter earns 42/100 on the Resource Investment Index, with class sizes smaller than 76% of California schools. It is also less racially and ethnically mixed than most California schools. 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 San Luis Obispo County Office of Education?
Besides Grizzly Challenge Charter, San Luis Obispo County Office of Education also operates San Luis Obispo County Community (76 students), San Luis County Special Education (17 students), and San Luis Obispo County Juvenile Court (11 students). See the San Luis Obispo County Office of Education district page for the complete list.
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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.