The bulletin board for America's public schools. Parents, teachers, students, and staff. One community per school.
SCHOOL COMMUNITY·SCHOOL DISTRICT 27J·NCES 080258001822

John W Thimmig Elementary School

11453 OSWEGO STREET, HENDERSON, CO 80640 · (303) 655-2750 · Adams County
GRADES PK–05ELEMENTARY13-CITYTITLE IREGULAR SCHOOL531 STUDENTS
C-
allk12 Grade
Scored higher than 21% of Colorado public elementary schools
  • CTest 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.
  • ·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

Enrollment
531
Elementary
DISTRICT 612 · STATE 379
Student : Teacher
17.7:1
30 FTE teachers
DISTRICT 22.4:1 · STATE 16.6:1
Free / Reduced Lunch
56%
297 students
DISTRICT 51% · STATE 50%
Community
6
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

GradeStudentsShare
Pre-K7013%
Kindergarten5811%
Grade 16512%
Grade 28316%
Grade 36713%
Grade 49618%
Grade 59217%

This year's kindergarten class (58) is 37% smaller than its 5th grade class (92).

Student demographics
54%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 59% · STATE 62% · US 70%
White
15529%
DISTRICT 36% · STATE 49% · US 43%
Hispanic
32261%
DISTRICT 52% · STATE 37% · US 30%
Black
183%
DISTRICT 3% · STATE 5% · US 15%
Asian
204%
DISTRICT 4% · STATE 3% · US 6%
Two+
153%
DISTRICT 4% · STATE 5% · US 5%
Pacific Islander
10%
DISTRICT 0% · STATE 0% · US 0%
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
Male
28153%
Female
25047%

Discussions

+ POST

Test scores

CMAS 2024-25 . % Met or Exceeded Expectations
English Language Arts
33.3%
CO avg 44.9% . +6.4pp since 2023
Math
26.7%
CO avg 36.1% . +4.8pp since 2023

What this means: On the CMAS, Colorado's statewide test, about 33 of every 100 students at this school read and write at grade level and about 27 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 6 points since 2023, while math scores are up about 5 points.

CMAS results by year

School yearEnglish Language ArtsMath
2024-2533.3%26.7%
2023-2426.9%21.9%
% 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 · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
27.4%
composite math + reading, all grades
Predicted
32.8%
based on CO schools with similar FRL share
Beats by
-5.4pp
below demographic expectation

What this means: About 27% of students here test proficient in math and reading, compared with the roughly 33% 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 John W Thimmig Elementary School

John W Thimmig Elementary School's state test result (27.4% proficient) is higher than 1 of the 4 schools below with a result.

SchoolStudentsLow-incomeProficient
John W Thimmig Elementary School this school53155.9%27.4%
Trailside Academy
DENVER
49258.3%20.1%
Arapahoe Ridge Elementary School
WESTMINSTER
46556.6%48.1%
Mary E Pennock Elementary School
BRIGHTON
59259.8%31.0%
Meadow Ridge Elementary School
LOCHBUIE
44056.1%N/A
Columbine Elementary School
FORT MORGAN
42150.8%28.8%
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 John W Thimmig Elementary School ranks

Among elementary schools
MeasureThis schoolIn ColoradoIn Adams County
State test proficiency
ranked highest first
27.4%#628 of 931#30 of 89
Math proficiency
ranked highest first
26.7%#595 of 940
▲ 65
#27 of 89
▲ 14
Reading proficiency
ranked highest first
33.3%#600 of 946
▲ 94
#26 of 89
▲ 12
Enrollment
ranked largest first
531#184 of 1,056#24 of 97
Students per teacher
ranked fewest first
17.7:1#744 of 896#62 of 90
Diversity index
ranked most diverse first
54.4%#327 of 896#35 of 90
Free and reduced lunch
ranked highest share first
55.9%#412 of 983#66 of 91
Enrollment change since 2017-18
ranked steepest decline first
-21.3%#251 of 664#25 of 63
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 2024-25
Enrollment
531
-28 (-5%) vs 2020
-14% since 2010-11, when it was 618
Student : Teacher
17.7:1
was 16.0:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-255313017.7:156% (297)
2023-2449528.317.5:154% (265)
2022-2352826.519.9:142% (221)
2020-215593516.0:138% (210)
2017-1867535.419.1:143% (289)
2015-167283421.4:138% (280)
2010-116182623.8:133% (203)
Source: NCES Common Core of Data. Rows are the federal collections on file for John W Thimmig Elementary School.

Since 2017-18: students down 21% (675 to 531); teachers down 15% (35.4 to 30).

About John W Thimmig Elementary School

John W Thimmig Elementary School is an elementary school with a street address in HENDERSON, Colorado. It covers pre-K through 5, with a total enrollment of 531 students. Statewide, elementary schools in Colorado average about 379 students each.

School District 27J operates 33 schools. Combined enrollment is 24,044 students.

John W Thimmig Elementary School's enrollment is 61% Hispanic. Other groups include 29% White, 4% Asian, 3% Black, and 3% multiracial. By comparison, Adams County residents are about 43% Hispanic. By the diversity index, John W Thimmig Elementary School comes in at 54%.

A ratio of 17.7:1 comes from the school's 30 full-time-equivalent teachers. For comparison, elementary schools in Colorado average 16.6:1. Free or reduced-price lunch eligibility was 56% in 2024-25.

John W Thimmig Elementary School is graded C- by allk12, scoring above 21% of Colorado public elementary schools once test results, poverty-adjusted performance, and the recent trend are combined.

BeatsExpectations compares each school's average proficiency rate on state tests with a prediction based on free or reduced-price lunch eligibility. For John W Thimmig Elementary School, the prediction is 32.8% and the result is 27.4%.

In the county around the school, Adams County, median household income is about $94,571, 29% of adults hold a bachelor's degree or higher, and about 7% of residents live below the federal poverty line. John W Thimmig Elementary School is among the 171 public schools in Adams County.

The shortest distance from John W Thimmig Elementary School to another public school is about 1.0 miles, to Prairie View High School. The five-mile area around John W Thimmig Elementary School holds at least 8 other public schools. John W Thimmig Elementary School comes in 2nd of 9 nearby schools on average proficiency.

The National Center for Education Statistics classifies the school's location as City: Small, meaning it is inside a principal city with a population under 100,000.

Enrollment was 559 in 2020-21 and 531 in 2024-25, a decrease of 28 students. There were more students per teacher in 2024-25 (17.7:1) than in 2020-21 (16.0:1).

Topics for discussion here include sports tryouts, band and choir, and theater. Alumni can share how the school prepared them.

Adams County at a glance

View full county profile
Population
530,225
Census ACS
Median income
$94,571
Household, ACS
Bachelor's+
29%
Adults 25+
Poverty rate
7%
Below federal line
Schools in county
171
87,938 students

Quick facts

School name
John W Thimmig Elementary School
District
School District 27J
Address
11453 OSWEGO STREET, HENDERSON, CO 80640
Phone
(303) 655-2750
County
Adams County
Level
Elementary
Grade range
PK–05
Total enrollment
531
Teachers (FTE)
30
Student–teacher ratio
17.7:1
Free and reduced lunch
297 (56%)
Locale
13-City: Small
NCES ID
080258001822
Charter school
No
Virtual school
No

Related schools

Other schools in School District 27J
Other schools in HENDERSON
Nearby schools

Frequently asked questions

About John W Thimmig Elementary School
How large is John W Thimmig Elementary School?
John W Thimmig Elementary School enrolls approximately 531 students in grades PK-05.
Is John W Thimmig Elementary School an elementary, middle, or high school?
John W Thimmig Elementary School is an elementary school covering grades PK-05.
How many students per teacher at John W Thimmig Elementary School?
Approximately 17.7:1 students per teacher at John W Thimmig Elementary School.
What is the racial breakdown of students at John W Thimmig Elementary School?
At John W Thimmig Elementary School, the student body is approximately 29% White, 61% Hispanic, 3% Black, 4% Asian, 3% Two or more.
Is John W Thimmig Elementary School public or private?
John W Thimmig Elementary School is a public K-12 school, overseen by School District 27J.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
+ Post