School overview
At a glance
Reported students
21
NCES CCD 2024–25, where reported
Teachers (FTE)
2
NCES CCD 2024–25
Student–teacher ratio
10.5:1
Calculated, not a class-size measure
Grades served
06–12
NCES preliminary directory 2025–26
School benchmarks
California high enrollment
11th percentile
Compared with 2,196 same-level schools reporting enrollment.
District median enrollment
522
Glenbrook Academy: 21 reported students.
State peer staffing position
15th percentile
10.5:1 reported; state peer median 19.2:1. Ratio is not class size.
Profile interpretation
What the reported data says about Glenbrook Academy
Glenbrook Academy is a public high school serving grades 06–12 in Concord. It is one of 51 current school records connected to Mt. Diablo Unified. NCES reports 21 students for 2024–25.
Among 2,196 high schools in California with comparable records, this school is smaller than the reported median of 414.5 students. Its enrollment is at approximately the 11th percentile for that peer group. Size describes the campus, not instructional quality.
The reported student–teacher ratio is 10.5:1, below the California median of 19.2:1 for the same school level. This ratio uses total enrollment and teacher FTE; it is not an average classroom headcount and can be affected by special programs or part-time staffing.
The two largest reported race and ethnicity groups are Hispanic or Latino (52.4%) and White (28.6%). English learners represent 18.8% of enrollment. Students served under IDEA represent 100%. These figures help families understand who the school serves; they are not rating inputs.
Turn data into a school visit
Questions worth asking Glenbrook Academy
- 1How do the reported 10.5:1 student–teacher ratio and 2 teacher FTE translate into actual class sizes by grade?
- 2Have the reported academic programs changed since the 2021–22 CRDC collection?
- 3How are the school's 0 counselor FTE allocated across grades and student needs?
- 4Does community eligibility provide breakfast and lunch to every enrolled student, and are summer meals available?
Student context
Enrollment needs
- English learners
- 18.8%
- Students with disabilities
- 100%
- Free/reduced-price lunch
- 57.1%
- Lunch program
- Yes under Community Eligibility Option (CEO)
People available to students
Support staff
- Counselors (FTE)
- 0
- Nurses (FTE)
- 0.1
- Psychologists (FTE)
- 1
- Social workers (FTE)
- 0
Student demographics
Race and ethnicity share of reported enrollment
- White28.6%
- Hispanic52.4%
- Black9.5%
- Asian0%
- American Indian / Alaska Native0%
- Native Hawaiian / Pacific Islander0%
- Multiracial9.5%
Race/ethnicity: NCES CCD 2024–25 where reported, otherwise CRDC 2021–22. English learner and disability context: CRDC 2021–22. Privacy rules can produce missing values.
Learning opportunities
Programs reported by the school
Advanced Placement
Not reported as offered
Gifted and talented
Not reported as offered
Computer science
Not reported as offered
Program availability is from CRDC 2021–22 and can change. Confirm current courses and eligibility with the school.
Continue exploring
Other schools in Mt. Diablo Unified
Start with campuses at the same school level or with similar reported enrollment.
Crossroads High
High · Grades 07–12
12 reported students
Prospect High (Continuation)
High · Grades 09–12
60 reported students
Olympic High
High · Grades 09–12
233 reported students
Ygnacio Valley High
High · Grades 09–12
1,059 reported students
Concord High
High · Grades 09–12
1,137 reported students
Mt. Diablo High
High · Grades 09–12
1,397 reported students