1
How has CENTENNIAL HIGH SCHOOL changed in the last five years, for better or worse?
Community prompt from u/allk12. Replies below.
Enrollment
1,743
High
DISTRICT 961 · STATE 455
SCHOOL COMMUNITY·JOINT SCHOOL DISTRICT NO. 2·NCES 160210000674
CENTENNIAL HIGH SCHOOL
12400 WEST MCMILLAN ROAD, BOISE, ID 83713 · (208) 855-4250 · Ada County
GRADES 09–12HIGH12-CITYREGULAR SCHOOL1,743 STUDENTS
A-
allk12 Grade
Scored higher than 80% of Idaho 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.
- ·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 Idaho public high schools
Student : Teacher
20.3:1
86 FTE teachers
DISTRICT 18.0:1 · STATE 16.0:1
Free / Reduced Lunch
30%
530 students
DISTRICT 33% · STATE 46%
Community
5
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 | 472 | 27% |
| Grade 10 | 414 | 24% |
| Grade 11 | 437 | 25% |
| Grade 12 | 420 | 24% |
Student demographics
43%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 42% · STATE 44% · 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
ISAT 2024-25 . % ProficientEnglish Language Arts
74.3%
ID avg 53.4%
Math
46.4%
ID avg 43.5%
What this means: On the ISAT, Idaho's statewide test, about 74 of every 100 students at this school read and write at grade level and about 46 of 100 do math at grade level. Across all Idaho schools, those numbers are about 53 and 44.
Source: ISAT. All students, all grades. See all years and grades →
Schools most like CENTENNIAL HIGH SCHOOL
| School | Students | Low-income | Proficient |
|---|---|---|---|
| CENTENNIAL HIGH SCHOOL this school | 1,743 | 30.4% | N/A |
| MOUNTAIN VIEW HIGH SCHOOL MERIDIAN | 2,463 | 23.1% | N/A |
| BORAH SENIOR HIGH SCHOOL BOISE | 1,308 | 38.0% | N/A |
| BOISE SENIOR HIGH SCHOOL BOISE | 1,512 | 19.2% | N/A |
| CAPITAL SENIOR HIGH SCHOOL BOISE | 1,170 | 36.3% | N/A |
| CANYON RIDGE HIGH SCHOOL TWIN FALLS | 1,445 | 38.8% | N/A |
Matched among Idaho 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 CENTENNIAL HIGH SCHOOL ranks
Among high schools| Measure | This school | In Idaho | In Ada County |
|---|---|---|---|
| Math proficiency ranked highest first | 46.4% | #19 of 84 | #8 of 15 |
| Reading proficiency ranked highest first | 74.3% | #17 of 97 | #5 of 13 |
| Enrollment ranked largest first | 1,743 | #7 of 198 | #6 of 29 |
| Students per teacher ranked fewest first | 20.3:1 | #78 of 105 | #12 of 18 |
| Diversity index ranked most diverse first | 42.8% | #37 of 105 | #8 of 18 |
| Free and reduced lunch ranked highest share first | 30.4% | #105 of 146 | #10 of 21 |
| Enrollment change since 2017-18 ranked steepest decline first | -8.3% | #30 of 50 | #7 of 9 |
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
1,743
-118 (-6%) vs 2020
-13% since 1990-91, when it was 2,015
Student : Teacher
20.3:1
was 20.4:1
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 | 1,743 | 85.7 | 20.3:1 | 30% (530) |
| 2023-24 | 1,770 | 85.5 | 20.7:1 | 23% (414) |
| 2022-23 | 1,931 | 91.1 | 21.2:1 | 22% (419) |
| 2020-21 | 1,861 | 91 | 20.4:1 | 15% (286) |
| 2017-18 | 1,901 | 89.9 | 21.1:1 | 27% (518) |
| 2015-16 | 1,738 | 82 | 21.2:1 | 24% (418) |
| 2010-11 | 1,754 | 94 | 18.7:1 | 26% (464) |
| 2000-01 | 2,104 | 99 | 21.3:1 | 11% (234) |
| 1990-91 | 2,015 | 87 | 23.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for CENTENNIAL HIGH SCHOOL.
Since 2017-18: students down 8% (1,901 to 1,743); teachers down 5% (89.9 to 85.7).
About CENTENNIAL HIGH SCHOOL
CENTENNIAL HIGH SCHOOL sits in BOISE, Idaho, and is classified as a high school. The school covers grades 9 through 12 and reported 1,743 students in 2024-25. That puts enrollment 283% above the 455-student average for high schools in Idaho.
CENTENNIAL HIGH SCHOOL reports to JOINT SCHOOL DISTRICT NO. 2, which has 61 schools and 38,740 students.
Federal enrollment data show CENTENNIAL HIGH SCHOOL is 74% White. Enrollment also includes 13% Hispanic, 5% multiracial, 4% Black, and 4% Asian. The school's White share is 9 points below the 83% share among Ada County residents. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 43%.
A staff of 85.7 full-time-equivalent teachers puts the student-to-teacher ratio at 20.3:1. Across high schools in Idaho, the average ratio is 16.0:1. The share of students eligible for free or reduced-price lunch is 30%.
Among Idaho public high schools, CENTENNIAL HIGH SCHOOL outscored 80%, which works out to an A- on the allk12 Grade.
For the population of Ada County, the median household earns about $91,502 a year, a bachelor's degree or higher is held by about 45% of adults, and the share of residents below the poverty line is 5%. CENTENNIAL HIGH SCHOOL shares Ada County with 155 other public schools.
JOPLIN ELEMENTARY SCHOOL sits about 0.4 miles from CENTENNIAL HIGH SCHOOL. Around the school, at least 8 other public schools are within five miles.
The school is inside a principal city with a population between 100,000 and 250,000, according to its NCES locale (City: Mid-size).
Enrollment decreased by 6% across 4 years, from 1,861 in 2020-21 to 1,743 in 2024-25.
The CENTENNIAL HIGH SCHOOL discussion page is a place for special education services, counseling, and support programs. Teachers and staff are welcome to share updates too.
Ada County at a glance
View full county profilePopulation
518,935
Census ACS
Median income
$91,502
Household, ACS
Bachelor's+
45%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
156
80,006 students
Quick facts
Related schools
Other schools in JOINT SCHOOL DISTRICT NO. 2
- MOUNTAIN VIEW HIGH SCHOOLHigh · 2,463 students
- OWYHEE HIGH SCHOOLHigh · 1,884 students
- ROCKY MOUNTAIN HIGH SCHOOLHigh · 1,848 students
- MERIDIAN HIGH SCHOOLHigh · 1,774 students
- EAGLE HIGH SCHOOLHigh · 1,765 students
- VICTORY MIDDLE SCHOOLMiddle · 1,075 students
Other schools in BOISE
- BOISE SENIOR HIGH SCHOOLHigh · 1,512 students
- BORAH SENIOR HIGH SCHOOLHigh · 1,308 students
- TIMBERLINE HIGH SCHOOLHigh · 1,307 students
- iSUCCEED VIRTUAL HIGH SCHOOLHigh · 1,290 students
- INSPIRE VIRTUAL CHARTER SCHOOLCombined · 1,210 students
- CAPITAL SENIOR HIGH SCHOOLHigh · 1,170 students
Other Centennial High schools
16 other US public schools in 14 states are named Centennial High. CENTENNIAL HIGH SCHOOL is the 7th largest of the 17.
- Centennial High SchoolLas Vegas, NV · 2,961 students
- Centennial HighCorona, CA · 2,712 students
- Centennial HighBakersfield, CA · 2,212 students
- Centennial High SchoolCIRCLE PINES, MN · 2,067 students
- Centennial High SchoolPEORIA, AZ · 2,026 students
Nearby schools
- JOPLIN ELEMENTARY SCHOOL0.4 mi · 241
- FLYERS CENTER0.4 mi · 10
- PIONEER SCHOOL OF THE ARTS0.6 mi · 658
- PATHWAYS IN EDUCATION - WEST ADA0.7 mi · 79
- LOWELL SCOTT MIDDLE SCHOOL0.7 mi · 773
- iSucceed Academy0.7 mi · 345
Frequently asked questions
About CENTENNIAL HIGH SCHOOLHow many students attend CENTENNIAL HIGH SCHOOL?
CENTENNIAL HIGH SCHOOL enrolls approximately 1,743 students in grades 09-12.
Is CENTENNIAL HIGH SCHOOL an elementary, middle, or high school?
CENTENNIAL HIGH SCHOOL is a high school covering grades 09-12.
How many students per teacher at CENTENNIAL HIGH SCHOOL?
Approximately 20.3:1 students per teacher at CENTENNIAL HIGH SCHOOL.
How diverse is CENTENNIAL HIGH SCHOOL?
CENTENNIAL HIGH SCHOOL reports a student body of 74% White, 13% Hispanic, 4% Black, 4% Asian, 5% Two or more.
What district is CENTENNIAL HIGH SCHOOL in?
CENTENNIAL HIGH SCHOOL is part of JOINT SCHOOL DISTRICT NO. 2.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.