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What's the biggest difference between Cosumnes Oaks High and what you expected?
Community prompt from u/allk12. Replies below.
Enrollment
2,109
High
DISTRICT 1,516 · STATE 838
SCHOOL COMMUNITY·ELK GROVE UNIFIED·NCES 061233012274
Cosumnes Oaks High
8350 Lotz Pkwy., Elk Grove, CA 95757 · (916) 683-7670 · Sacramento County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL2,109 STUDENTS
B
allk12 Grade
Scored higher than 60% of California public high schools
- A-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- C+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- C+Three-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded California public high schools
Student : Teacher
21.4:1
98 FTE teachers
DISTRICT 19.3:1 · STATE 18.2:1
Free / Reduced Lunch
39%
821 students
DISTRICT 62% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 541 | 26% |
| Grade 10 | 497 | 24% |
| Grade 11 | 522 | 25% |
| Grade 12 | 549 | 26% |
Student demographics
73%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 75% · STATE 62% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
65.8%
CA avg 49.1% . -7.2pp since 2014
Math
42.5%
CA avg 37.7% . -6.5pp since 2014
What this means: On the CAASPP, California's statewide test, about 66 of every 100 students at this school read and write at grade level and about 42 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are down about 7 points since 2014, while math scores are down about 7 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 34.6% | 31.2% | 19.0% | 15.2% |
| Math | 18.3% | 24.2% | 24.6% | 32.9% |
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.
CAASPP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 65.8% | 42.5% |
| 2023-24 | 66.8% | 41.7% |
| 2022-23 | 73.3% | 43.8% |
| 2021-22 | 64.4% | 42.1% |
| 2020-21 | 73.0% | 57.6% |
| 2018-19 | 71.2% | 53.5% |
| 2017-18 | 66.7% | 43.1% |
| 2016-17 | 72.7% | 49.5% |
| 2015-16 | 69.0% | 49.0% |
| 2014-15 | 73.0% | 49.0% |
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
54.2%
composite math + reading, all grades
Predicted
56.7%
based on CA schools with similar FRL share
Beats by
-2.5pp
below demographic expectation
What this means: About 54% of students here test proficient in math and reading, compared with the roughly 57% typical for California schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among California's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Cosumnes Oaks High
Cosumnes Oaks High's state test result (54.2% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Cosumnes Oaks High this school | 2,109 | 38.9% | 54.2% |
| Franklin High Elk Grove | 2,650 | 39.9% | 50.1% |
| Castro Valley High Castro Valley | 2,874 | 40.0% | 58.2% |
| Cerritos High Cerritos | 1,996 | 43.1% | 70.4% |
| Hercules High Hercules | 767 | 41.7% | 50.0% |
| Arnold O. Beckman High Irvine | 2,776 | 44.5% | 72.7% |
Matched among California high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Cosumnes Oaks High ranks
Among high schools| Measure | This school | In California | In Sacramento County |
|---|---|---|---|
| State test proficiency ranked highest first | 54.2% | #262 of 1,052 | #7 of 45 |
| Math proficiency ranked highest first | 42.5% | #238 of 1,056 ▼ 4 | #7 of 45 ▼ 1 |
| Reading proficiency ranked highest first | 65.8% | #339 of 1,056 ▼ 43 | #7 of 45 ▼ 1 |
| 3-year test score change ranked biggest gain first | +0.9pp | #597 of 1,044 | #23 of 44 |
| Enrollment ranked largest first | 2,109 | #228 of 2,093 | #9 of 77 |
| Students per teacher ranked fewest first | 21.4:1 | #751 of 1,352 | #26 of 50 |
| Diversity index ranked most diverse first | 73.1% | #46 of 1,351 | #15 of 50 |
| Free and reduced lunch ranked highest share first | 38.9% | #1,303 of 1,575 | #58 of 64 |
| Enrollment change since 2017-18 ranked steepest decline first | -10.3% | #448 of 802 | #11 of 23 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
2,109
+34 (+2%) vs 2020
+44% since 2010-11, when it was 1,461
Student : Teacher
21.4:1
was 23.1:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 2,109 | 98.3 | 21.4:1 | 39% (821) |
| 2023-24 | 2,151 | 97.2 | 22.1:1 | 34% (724) |
| 2022-23 | 2,212 | 97.2 | 22.8:1 | 31% (692) |
| 2020-21 | 2,075 | 90 | 23.1:1 | 27% (568) |
| 2017-18 | 2,350 | 103.9 | 22.6:1 | 32% (745) |
| 2015-16 | 2,237 | 107 | 20.9:1 | 33% (743) |
| 2010-11 | 1,461 | N/A | N/A | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Cosumnes Oaks High.
Since 2017-18: students down 10% (2,350 to 2,109); teachers down 5% (103.9 to 98.3).
About Cosumnes Oaks High
Cosumnes Oaks High is a large high school found in Elk Grove, California. It enrolled 2,109 students in grades 9 through 12 for the 2024-25 school year. Statewide, high schools in California average about 838 students each.
Cosumnes Oaks High is part of Elk Grove Unified, where 67 schools serve 63,232 students.
Asian students are the largest group at Cosumnes Oaks High, with 43% of enrollment. The remaining shares are 20% Hispanic, 14% White, 12% Black, and 11% multiracial. Sacramento County as a whole is about 18% Asian, so the school's share is higher. The chance that two students picked at random at Cosumnes Oaks High belong to different racial or ethnic groups, known as the diversity index, is 73%.
Teacher staffing is 98.3 full-time equivalents, or about 21.4 students per teacher. The 18.2:1 average for high schools in California is lower than this school's figure. Eligibility for subsidized school meals is 39%. By comparison, the figure for public schools in Sacramento County is 63%.
The allk12 Grade for Cosumnes Oaks High is B. Compared with California public high schools, the school scored higher than 60% on a mix of test scores, poverty-adjusted results, and recent trend.
The school's average proficiency rate on state tests is 54.2%. For its free or reduced-price lunch share, the predicted value is 56.7%.
Recent Census Bureau figures for Sacramento County show that median household income is about $92,175, 34% of adults hold a bachelor's degree or higher, and about 9% of people live in poverty. Federal data list 387 public schools in Sacramento County, with a combined enrollment of about 259,342.
The school nearest to Cosumnes Oaks High is Elizabeth Pinkerton Middle, at a distance of about 0.2 miles. Counting only straight-line distance, at least 8 other public schools are within five miles. Among the 7 closest schools with test data, this one included, Cosumnes Oaks High ranks 4th on average proficiency.
The school is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more, according to its NCES locale (Suburb: Large).
Enrollment in 2024-25 was 2,109, close to the 2,075 recorded in 2020-21. From 2020-21 to 2024-25, the ratio fell from 23.1:1 to 21.4:1.
Threads on this page can be about school events, clubs, and volunteer needs. Anyone with firsthand experience at this school can post or comment.
Sacramento County at a glance
View full county profilePopulation
1,594,006
Census ACS
Median income
$92,175
Household, ACS
Bachelor's+
34%
Adults 25+
Poverty rate
9%
Below federal line
Schools in county
387
259,342 students
Quick facts
Related schools
Other schools in Elk Grove Unified
- Franklin HighHigh · 2,650 students
- Pleasant Grove HighHigh · 2,536 students
- Sheldon HighHigh · 2,368 students
- Monterey Trail HighHigh · 2,263 students
- Laguna Creek HighHigh · 2,142 students
- Elk Grove HighHigh · 1,684 students
Other schools in Elk Grove
- Franklin HighHigh · 2,650 students
- Pleasant Grove HighHigh · 2,536 students
- Monterey Trail HighHigh · 2,263 students
- Laguna Creek HighHigh · 2,142 students
- Elk Grove HighHigh · 1,684 students
- Katherine L. Albiani MiddleMiddle · 1,447 students
Nearby schools
- Elizabeth Pinkerton Middle0.2 mi · 1,136
- Zehnder Ranch Elementary0.5 mi · 1,019
- Miwok Village Elementary0.7 mi · 1,050
- Elk Grove High1.3 mi · 1,684
- Ellen Feickert Elementary1.4 mi · 541
- Jessie Baker1.4 mi · 170
Frequently asked questions
About Cosumnes Oaks HighWhat is the total enrollment at Cosumnes Oaks High?
Cosumnes Oaks High enrolls approximately 2,109 students in grades 09-12.
Is Cosumnes Oaks High an elementary, middle, or high school?
Cosumnes Oaks High is a high school covering grades 09-12.
How many students per teacher at Cosumnes Oaks High?
Approximately 21.4:1 students per teacher at Cosumnes Oaks High.
How diverse is Cosumnes Oaks High?
Cosumnes Oaks High reports a student body of 14% White, 20% Hispanic, 12% Black, 43% Asian, 11% Two or more.
Who oversees Cosumnes Oaks High?
Cosumnes Oaks High is overseen by Elk Grove Unified in Sacramento County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.