Enrollment
315
High
DISTRICT 847 · STATE 627
SCHOOL COMMUNITY·JEFFERSON COUNTY SCHOOL DISTRICT NO. R-1·NCES 080480000765
Jefferson County Open Secondary
7655 WEST 10TH AVENUE, LAKEWOOD, CO 80215 · (303) 982-7045 · Jefferson County
GRADES 07–12HIGH21-SUBURBREGULAR SCHOOL315 STUDENTS
A-
allk12 Grade
Scored higher than 77% of Colorado public high schools
- B+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- ·Beats expectations Not available for this school, so the grade uses the other parts.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Colorado public high schools
Student : Teacher
15.0:1
21 FTE teachers
DISTRICT 16.9:1 · STATE 16.9:1
Free / Reduced Lunch
,
Title I proxy
DISTRICT 35% · STATE 50%
Community
0
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 7 | 47 | 15% |
| Grade 8 | 48 | 15% |
| Grade 9 | 54 | 17% |
| Grade 10 | 52 | 17% |
| Grade 11 | 50 | 16% |
| Grade 12 | 64 | 20% |
Student demographics
43%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 52% · 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
QUIET COMMUNITY
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START A DISCUSSIONTest scores
CMAS 2024-25 . % Met or Exceeded ExpectationsEnglish Language Arts
59.3%
CO avg 44.9% . +8.7pp since 2023
Math
32.9%
CO avg 36.1% . -7.1pp since 2023
What this means: On the CMAS, Colorado's statewide test, about 59 of every 100 students at this school read and write at grade level and about 33 of 100 do math at grade level. Across all Colorado schools, those numbers are about 45 and 36. Reading and writing scores are up about 9 points since 2023, while math scores are down about 7 points.
CMAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 59.3% | 32.9% |
| 2023-24 | 50.6% | 40.0% |
% Met or Exceeded Expectations, all students and all tested grades.
Source: CMAS. All students, all grades. See all years and grades →
Where Jefferson County Open Secondary ranks
Among high schools| Measure | This school | In Colorado | In Jefferson County |
|---|---|---|---|
| Math proficiency ranked highest first | 32.9% | #16 of 54 ▼ 7 | N/A |
| Reading proficiency ranked highest first | 59.3% | #8 of 57 ▲ 3 | N/A |
| Enrollment ranked largest first | 315 | #207 of 409 | #20 of 28 |
| Students per teacher ranked fewest first | 15.0:1 | #66 of 250 | #4 of 21 |
| Diversity index ranked most diverse first | 42.6% | #164 of 250 | #14 of 21 |
| Enrollment change since 2017-18 ranked steepest decline first | -0.9% | #135 of 139 | #16 of 16 |
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
315
-1 (0%) vs 2020
-49% since 1990-91, when it was 622
Student : Teacher
15.0:1
was 15.8:1
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 | 315 | 21 | 15.0:1 | N/A |
| 2023-24 | 324 | 22 | 14.7:1 | N/A |
| 2022-23 | 317 | 21 | 15.1:1 | N/A |
| 2020-21 | 316 | 20 | 15.8:1 | N/A |
| 2017-18 | 318 | 21 | 15.1:1 | 28% (89) |
| 2015-16 | 319 | 22 | 14.5:1 | 30% (96) |
| 2010-11 | 340 | 22 | 15.4:1 | 33% (112) |
| 2000-01 | 270 | 16 | 16.9:1 | 13% (35) |
| 1990-91 | 622 | 16 | 38.9:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Jefferson County Open Secondary.
Since 2017-18: students down 1% (318 to 315); teachers unchanged (21 to 21).
About Jefferson County Open Secondary
Jefferson County Open Secondary is a small high school based in LAKEWOOD, Colorado. It serves 315 students in grades 7 through 12. For comparison, high schools in Colorado average about 627 students.
Across its 148 schools, Jefferson County School District No. R-1 enrolls 74,935 students. Jefferson County Open Secondary is one of those schools.
By race and ethnicity, Jefferson County Open Secondary is 73% White. Beyond that, enrollment is 17% Hispanic and 8% multiracial. By the diversity index, Jefferson County Open Secondary comes in at 43%.
Dividing enrollment by its 21 full-time-equivalent teachers gives a ratio of about 15.0:1. The average ratio among high schools in Colorado is 16.9:1, higher than at this school.
Jefferson County Open Secondary is graded A- by allk12, scoring above 77% of Colorado public high schools once test results, poverty-adjusted performance, and the recent trend are combined.
Jefferson County census figures show that median household income is about $110,656, about 52% of adults have at least a bachelor's degree, and the poverty rate is about 4%. A total of 168 public schools operate in Jefferson County, serving about 74,739 students.
The nearest other public school, Jefferson County Open Elementary School, is less than a tenth of a mile away. The count of other public schools within five miles is at least 8.
Federal data place Jefferson County Open Secondary in the Suburb: Large locale, which means it is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
There was little change in enrollment from 2020-21 (316) to 2024-25 (315).
Topics for discussion here include school safety, transportation, and start times. Anyone with firsthand experience at this school can post or comment.
Jefferson County at a glance
View full county profilePopulation
579,377
Census ACS
Median income
$110,656
Household, ACS
Bachelor's+
52%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
168
74,739 students
Quick facts
Related schools
Other schools in Jefferson County School District No. R-1
- Arvada West High SchoolHigh · 1,923 students
- Ralston Valley Senior High SchoolHigh · 1,875 students
- Chatfield High SchoolHigh · 1,808 students
- Lakewood High SchoolHigh · 1,735 students
- Columbine High SchoolHigh · 1,710 students
- Golden High SchoolHigh · 1,469 students
Other schools in LAKEWOOD
- Lakewood High SchoolHigh · 1,735 students
- Bear Creek High SchoolHigh · 1,344 students
- Green Mountain High SchoolHigh · 1,071 students
- Alameda International Junior/Senior High SchoolHigh · 1,002 students
- Bear Creek K-8 SchoolElementary · 863 students
- Dunstan Middle SchoolMiddle · 798 students
Nearby schools
- Jefferson County Open Elementary School0.0 mi · 236
- South Lakewood Elementary School1.1 mi · 393
- Eiber Elementary School1.2 mi · 255
- Jeffco Transition Services School1.3 mi · 116
- Lakewood High School1.3 mi · 1,735
- Jefferson Junior/Senior High School1.3 mi · 601
Frequently asked questions
About Jefferson County Open SecondaryHow large is Jefferson County Open Secondary?
Jefferson County Open Secondary enrolls approximately 315 students in grades 07-12.
Is Jefferson County Open Secondary an elementary, middle, or high school?
Jefferson County Open Secondary is a high school covering grades 07-12.
How many teachers does Jefferson County Open Secondary have?
Jefferson County Open Secondary employs 21 FTE teachers, for a student-to-teacher ratio of 15.0:1.
What is the student diversity at Jefferson County Open Secondary?
Student demographics at Jefferson County Open Secondary are roughly 73% White, 17% Hispanic, 1% Asian, 8% Two or more.
Is Jefferson County Open Secondary public or private?
Jefferson County Open Secondary is a public K-12 school, overseen by Jefferson County School District No. R-1.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.