Enrollment
260
Elementary
DISTRICT 404 · STATE 379
SCHOOL COMMUNITY·JEFFERSON COUNTY SCHOOL DISTRICT NO. R-1·NCES 080480000991
Mortensen Elementary School
8006 SOUTH IRIS, LITTLETON, CO 80128 · (303) 982-0022 · Jefferson County
GRADES PK–05ELEMENTARY21-SUBURBREGULAR SCHOOL260 STUDENTS
B-
allk12 Grade
Scored higher than 46% of Colorado public elementary schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·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 elementary schools
Student : Teacher
14.1:1
18 FTE teachers
DISTRICT 15.9:1 · STATE 16.6:1
Free / Reduced Lunch
37%
96 students
DISTRICT 35% · STATE 50%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Pre-K | 15 | 6% |
| Kindergarten | 34 | 13% |
| Grade 1 | 30 | 12% |
| Grade 2 | 42 | 16% |
| Grade 3 | 58 | 22% |
| Grade 4 | 27 | 10% |
| Grade 5 | 54 | 21% |
This year's kindergarten class (34) is 37% smaller than its 5th grade class (54).
Student demographics
49%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
Test scores
CMAS 2024-25 . % Met or Exceeded ExpectationsEnglish Language Arts
44.0%
CO avg 44.9% . +3.7pp since 2023
Math
42.7%
CO avg 36.1% . +2.4pp since 2023
What this means: On the CMAS, Colorado's statewide test, about 44 of every 100 students at this school read and write at grade level and about 43 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 4 points since 2023, while math scores are up about 2 points.
CMAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 44.0% | 42.7% |
| 2023-24 | 40.3% | 40.3% |
% Met or Exceeded Expectations, all students and all tested grades.
Source: CMAS. 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
41.9%
composite math + reading, all grades
Predicted
44.3%
based on CO schools with similar FRL share
Beats by
-2.5pp
below demographic expectation
What this means: About 42% of students here test proficient in math and reading, compared with the roughly 44% typical for Colorado 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 Colorado'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 Mortensen Elementary School
Mortensen Elementary School's state test result (41.9% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mortensen Elementary School this school | 260 | 36.9% | 41.9% |
| Mountain View Elementary School WINDSOR | 256 | 35.9% | 52.9% |
| Dutch Creek Elementary School LITTLETON | 286 | 35.0% | 43.3% |
| Palmer Lake Elementary School PALMER LAKE | 286 | 34.3% | 53.3% |
| Carrie Martin Elementary School LOVELAND | 247 | 32.4% | 50.0% |
| Skyway Park Elementary School COLORADO SPRINGS | 301 | 39.5% | 50.7% |
Matched among Colorado elementary 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 Mortensen Elementary School ranks
Among elementary schools| Measure | This school | In Colorado | In Jefferson County |
|---|---|---|---|
| State test proficiency ranked highest first | 41.9% | #412 of 931 | #51 of 82 |
| Math proficiency ranked highest first | 42.7% | #375 of 940 ▲ 8 | #48 of 85 no change |
| Reading proficiency ranked highest first | 44.0% | #451 of 946 ▲ 46 | #57 of 85 ▲ 4 |
| Enrollment ranked largest first | 260 | #810 of 1,056 | #83 of 89 |
| Students per teacher ranked fewest first | 14.1:1 | #242 of 896 | #13 of 86 |
| Diversity index ranked most diverse first | 49.3% | #472 of 896 | #32 of 86 |
| Free and reduced lunch ranked highest share first | 36.9% | #624 of 983 | #27 of 85 |
| Enrollment change since 2017-18 ranked steepest decline first | -34.3% | #67 of 664 | #5 of 62 |
Ranked against other public elementary 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
260
-92 (-26%) vs 2020
-42% since 2000-01, when it was 447
Student : Teacher
14.1:1
was 14.1:1
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 | 260 | 18.4 | 14.1:1 | 37% (96) |
| 2023-24 | 287 | 19.6 | 14.7:1 | 41% (117) |
| 2022-23 | 303 | 22.3 | 13.6:1 | 35% (105) |
| 2020-21 | 352 | 25 | 14.1:1 | 36% (127) |
| 2017-18 | 396 | 23.2 | 17.1:1 | 31% (123) |
| 2015-16 | 481 | 26 | 18.5:1 | 26% (124) |
| 2010-11 | 446 | 25 | 17.8:1 | 22% (99) |
| 2000-01 | 447 | 23 | 19.4:1 | 7% (32) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mortensen Elementary School.
Since 2017-18: students down 34% (396 to 260); teachers down 21% (23.2 to 18.4).
About Mortensen Elementary School
Mortensen Elementary School is an elementary school with a street address in LITTLETON, Colorado. A federal count lists 260 students at the school, in pre-K through 5. Average enrollment for elementary schools in Colorado is about 379, so this school runs 31% smaller than that.
Mortensen Elementary School is one of the 148 schools that make up Jefferson County School District No. R-1 (74,935 students in total).
By race and ethnicity, Mortensen Elementary School is 67% White. It is also 22% Hispanic, 5% multiracial, and 2% Black. For comparison, the population of Jefferson County is roughly 80% White. Mortensen Elementary School has a diversity index of 49%, compared with 70% for all US public school students.
Its 18.4 full-time-equivalent teachers give the school a ratio of 14.1:1. That ratio is under the 16.6:1 average for elementary schools in Colorado. Free or reduced-price lunch eligibility is 37%.
allk12 grades Mortensen Elementary School a B-. The grade compares the school only with Colorado public elementary schools, because each state gives its own test.
When test results are adjusted for free or reduced-price lunch eligibility, Mortensen Elementary School is 2.5 points below its prediction. Actual: 41.9%. Predicted: 44.3%.
County data help place the school in context: in Jefferson County, 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%. Mortensen Elementary School is among the 168 public schools in Jefferson County.
The next-closest public school is Shaffer Elementary School, about 0.3 miles away. There are at least 8 more public schools inside five miles. Ranking the closest schools with test data puts Mortensen Elementary School at 7th of 9.
Federal data place Mortensen Elementary School 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.
Federal counts put enrollment at 352 in 2020-21 and 260 in 2024-25, a 26% decrease.
Parents and students can post about school events, clubs, and volunteer needs at Mortensen Elementary School. Alumni can share how the school prepared them.
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 LITTLETON
- Chatfield High SchoolHigh · 1,808 students
- Heritage High SchoolHigh · 1,748 students
- Columbine High SchoolHigh · 1,710 students
- Dakota Ridge Senior High SchoolHigh · 1,277 students
- Littleton High SchoolHigh · 1,187 students
- Rocky Heights Middle SchoolMiddle · 1,129 students
Nearby schools
- Shaffer Elementary School0.3 mi · 497
- Collegiate Academy of Colorado0.5 mi · 245
- Falcon Bluffs Middle School0.6 mi · 567
- Coronado Elementary School0.9 mi · 384
- Deer Creek Middle School1.1 mi · 541
- Stony Creek Elementary School1.1 mi · 349
Frequently asked questions
About Mortensen Elementary SchoolWhat is the total enrollment at Mortensen Elementary School?
Mortensen Elementary School enrolls approximately 260 students in grades PK-05.
What age range does Mortensen Elementary School serve?
Mortensen Elementary School serves students from grade PK through grade 05.
How many students per teacher at Mortensen Elementary School?
Approximately 14.1:1 students per teacher at Mortensen Elementary School.
What is the racial breakdown of students at Mortensen Elementary School?
At Mortensen Elementary School, the student body is approximately 67% White, 22% Hispanic, 2% Black, 2% Asian, 5% Two or more.
What district is Mortensen Elementary School in?
Mortensen Elementary School is part of Jefferson County School District No. R-1.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.