HomeroomCalifornia public school data, readable by the families it describes.

California public school

Acalanes Center for Independent Study

School district
Acalanes Union High
City
Walnut Creek
County
Contra Costa
Grades served
9-12
School type
Not a charter school
County-district-school code
07616300107524

How to read this page

Homeroom does not rank schools. There is no score here, no grade, and no list putting one school above another. Each figure is shown on its own, with the public file it came from named at the bottom of the page.

Beside each figure are the same figures for this school's district and for California. They are there to give a number a size, not to award a verdict: being above or below either one is not by itself good or bad. Both come from the state's own district and statewide rows in the same file. Homeroom does not add schools together to make them, because any such total would quietly leave out the students whose numbers the state withheld.

A blank cell is not a zero, and a withheld number is not a zero either. Those are three different facts, and this page keeps them apart.

What each cell can say

A number
The state published this figure. It is printed exactly as published.
reported as zero
The state published a zero. Nobody was counted, and that is a fact the state recorded, not an empty space.
withheld to protect privacy
The state has this figure and holds it back, because the group is small enough that publishing the count could identify a student. Homeroom leaves it out. It is never filled in and never shown as a zero.
no figure published
The state published nothing here at all. That is different from a zero and different from a figure held back.

Students

Total enrollment at Acalanes Center for Independent Study on Census Day, 2025-26.
FigureAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
All students595,3785,731,2609,8600674

The last three columns are not about this school. They count all 10,534 active schools Homeroom holds, so that an empty row here can be read against how often the state publishes that figure at all.

Students by grade

Enrollment by grade at Acalanes Center for Independent Study on Census Day, 2025-26.
GradeAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Transitional kindergarten (TK)0 reported as zero0 reported as zero213,3139,8600674
Kindergarten0 reported as zero0 reported as zero355,3919,8600674
Grade 10 reported as zero0 reported as zero376,3939,8600674
Grade 20 reported as zero0 reported as zero387,0839,8600674
Grade 30 reported as zero0 reported as zero404,4549,8600674
Grade 40 reported as zero0 reported as zero420,7569,8600674
Grade 50 reported as zero0 reported as zero422,4999,8600674
Grade 60 reported as zero0 reported as zero428,6729,8600674
Grade 70 reported as zero0 reported as zero432,5659,8600674
Grade 80 reported as zero0 reported as zero438,9499,8600674
Grade 941,328462,2069,8600674
Grade 10141,307465,0899,8600674
Grade 11211,336445,9309,8600674
Grade 12201,407477,9609,8600674

Students by group

These are the groups the state counts, using its own categories. A group with a small number of students is often withheld, which is why so many of these rows say so.

Race and ethnicity

Race and ethnicity at Acalanes Center for Independent Study on Census Day, 2025-26.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Asian7831588,4198,34102,193
African Americanno figure published88276,1138,60401,930
Race or ethnicity not reportedno figure published6574,2445,65004,884
Filipinono figure published110126,9117,23603,298
Hispanic or Latino96613,209,8299,8230711
American Indian or Alaska Nativeno figure published724,1305,71504,819
Pacific Islanderno figure published1122,6925,14205,392
Two or more races7669280,4758,85101,683
White362,9361,128,4479,6220912

Gender

Gender at Acalanes Center for Independent Study on Census Day, 2025-26.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Female342,5882,784,9959,8160718
Male252,7732,941,7959,8480686
Non-binaryno figure published174,4701,81108,723

English language acquisition

English language acquisition at Acalanes Center for Independent Study on Census Day, 2025-26.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Adult English learnerno figure publishedno figure published4,52251010,483
English learner2179925,9079,5420992
English only514,2783,561,6829,8470687
Initial fluent English proficient4434273,7709,01801,516
English language acquisition status missingno figure publishedno figure published11644010,490
Reclassified fluent English proficient2486900,5999,43101,103
To be determinedno figure published164,6646,00804,526

Student groups

Student groups at Acalanes Center for Independent Study on Census Day, 2025-26.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Students with disabilities28724850,8229,7770757
English learners2179925,9079,5420992
Foster youthno figure published526,3976,39104,143
Homeless youthno figure published10217,4718,62601,908
Migrant youthno figure publishedno figure published48,0313,77306,761
Socioeconomically disadvantaged74963,618,0629,8530681

Chronic absenteeism

A student is chronically absent if they missed 10% or more of the days they were expected to attend. The rate below is the state's own figure, counted only from students eligible to be considered: a student enrolled too briefly, or exempt for reasons the state sets, is not part of it. Homeroom does not compute this rate; it is printed exactly as the state published it.

Chronic absenteeism at Acalanes Center for Independent Study, 2024-25 school year.
FigureAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
All students73.3%11.8%19.4%9,71883733

Race and ethnicity

Race and ethnicity chronic absenteeism at Acalanes Center for Independent Study, 2024-25 school year.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Asianwithheld to protect privacy7.2%8.1%5,1134,688733
African Americanwithheld to protect privacy22.5%31.3%4,8644,937733
Race or ethnicity not reportedwithheld to protect privacy18.5%19.4%1,9957,806733
Filipinowithheld to protect privacy4.7%9.1%2,9086,893733
Hispanic or Latino75%15.8%22.3%9,498303733
American Indian or Alaska Nativewithheld to protect privacywithheld to protect privacy31.6%4519,350733
Pacific Islanderwithheld to protect privacy25%31.3%5289,273733
Two or more raceswithheld to protect privacy8.2%16.5%5,7484,053733
White75.9%12.7%15.1%7,7912,010733

Gender

Gender chronic absenteeism at Acalanes Center for Independent Study, 2024-25 school year.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Female74.5%13.1%19.3%9,503282749
Male71%10.7%19.4%9,621171742
Non-binaryno figure published14.3%31.2%551,9908,489

Student groups

Student groups chronic absenteeism at Acalanes Center for Independent Study, 2024-25 school year.
GroupAt this schoolIn this districtIn CaliforniaSchools publishing itSchools withholding itSchools publishing nothing
Students with disabilities71.1%24.3%27.7%9,215544775
English learnerswithheld to protect privacy15.2%21.3%8,580983971
Foster youthno figure publishedwithheld to protect privacy37.3%9466,3663,222
Homeless youthno figure published27.3%34.9%5,6473,3191,568
Migrant youthno figure publishedno figure published17.3%1,1681,9607,406
Socioeconomically disadvantaged78.6%20%24.1%9,643156735

How much of this the state publishes

Coverage is published beside the data on purpose. A page that showed only what exists would read as a complete picture, and it is not one.

Active schools in this build
10,534
Schools publishing a total enrollment figure
9,860
Schools where that total is withheld
0
Schools publishing no total at all
674
Enrollment records matching no active school
698
Schools publishing a chronic absenteeism rate
9,718
Schools where that rate is withheld
83
Schools publishing no chronic absenteeism rate at all
733

What is not on this page yet

Teacher assignment data is not yet published here. California publishes, for each school, how many teaching assignments were held by a teacher with a clear credential matched to what they teach. Homeroom has read that file and confirmed what it contains, and has not yet decided how to publish it, so this page shows no figure about the teachers at this school.

The state dashboard indicators and per-pupil spending are not here yet either. Each one arrives with its own file and its own access date, or it does not arrive.

Where these numbers come from

Every figure above was copied from one of these files. Nothing was estimated, averaged, or filled in from a neighbouring number.

Enrollment
Census Day Enrollment Data. File: cdenroll2526.txt. School year: 2025-26. Downloaded: 2026-08-07. The state's page for this file
School names and districts
Public Schools and Districts directory. File: pubschls.txt. Downloaded: 2026-08-07. The state's page for this file
Chronic absenteeism
Chronic Absenteeism Data. File: chronicabsenteeism25.txt. School year: 2024-25. Downloaded: 2026-08-21. The state's page for this file