Enrollment
391
Massachusetts · 2024-25 NCES data
Other / mixed grade configuration · Cambridge, MA
King Open
Federal NCES profile for King Open, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 32/100.
2024-25 NCES dataOther / mixed grade configurationNCES 250327000228
👥 S:T ratio 60
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 38
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
King Open earns 32/100 on the Resource Investment Index, with class sizes smaller than 80% of Massachusetts schools. It is also more racially and ethnically mixed than most Massachusetts schools.
- #15 of 15
- schools in Cambridge · Resource Index
- 32
- Resource Index · Typical
- 10:1
- small classes for Massachusetts
- 391
- students enrolled
King Open has class sizes smaller than 80% of Massachusetts schools. Computed live against every Massachusetts school reporting to NCES.
By Resource Investment Index, King Open ranks #15 of 15 schools in Cambridge, MA.
School address
District: Cambridge · Massachusetts
NCES ID 250327000228 Verify on NCES CCD record →
Teachers (FTE)
39.0
Federal CCD staff survey
Students per teacher
10:1
vs 12.3:1 Massachusetts avg
-19% vs state
Student-teacher ratio in context
How King Open compares with Massachusetts and U.S. medians
What stands out at King Open
King Open is a mid-sized combined-grade school in Cambridge, Massachusetts, enrolling 391 students.
Class sizes run a bit leaner than typical: 10:1 puts it in the smaller third of Massachusetts schools by student-teacher ratio.
With 391 students, its enrollment sits close to the Massachusetts median campus size.
Its Resource Investment Index lands in the lower third of 1,831 scored Massachusetts schools.
Its student body is led by White (33%) and African American (24%), more mixed than most schools in the state (diversity index 77/100).
Counselor access is stretched at roughly 1564 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance runs somewhat below the norm, with 24.8% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Cambridge spends $38,967 per pupil, 74% above the Massachusetts average, a better-resourced district than most.
Among Cambridge's public schools, it stands alongside Prospect Hill Academy Charter School (890 students): King Open is smaller than that campus by headcount and runs heavier classes (10:1 vs 8.4:1).
Cambridge also operates Cambridge Rindge and Latin (2,072 students) and Amigos School (413 students) alongside King Open.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How King Open compares
King Open on the metrics families compare, against Massachusetts and U.S. means.
| Metric | This school | vs Massachusetts | Massachusetts avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 10:1 | ▼ 19% | 12.3:1 | 15.7:1 |
| Enrollment | 391 | top 54% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10:1
Leaner classes than 89% of US schools, among the more generously staffed nationally.
391
Bigger than 46% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
10:1
students per teacher
- 19% below state mean
Top 20% in Massachusetts - lower ratio than 80% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
24.8%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$38,967
per pupil, district-wide
- above Massachusetts avg of $22,458
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.3 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 3 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.8 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 32.7%
African American 23.5%
Hispanic or Latino 17.4%
Two or More 15.1%
Asian 11.3%
Largest group: White at 32.7% of enrollment.
Student-body diversity index 77.2/100
Simpson diversity index - at 77.2, King Open is more mixed than the Massachusetts school average of 47.3.
Programs
Funding & spending
District-wide per-pupil expenditure for Cambridge, which includes King Open.
$38,967
Per student
+74%
vs Massachusetts
Avg $22,458
+135%
vs U.S.
Avg $16,593
Revenue mix
Local 78.2%
State 17.7%
Federal 4.1%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How King Open Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Cambridge Rindge and Latin | Larger | No free-lunch data | Similar S:T ratio |
| Amigos School | Similar size | No free-lunch data | Similar S:T ratio |
| Graham and Parks | Similar size | No free-lunch data | Similar S:T ratio |
| Maria L. Baldwin | Similar size | No free-lunch data | Similar S:T ratio |
| Martin Luther King Jr. | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to King Open's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,072
- Students per teacher
- 9.7:1
- Resource Index
- 46/100
- Enrollment
- 413
- Students per teacher
- 10.9:1
- Resource Index
- 48/100
- Enrollment
- 367
- Students per teacher
- 10.5:1
- Resource Index
- 46/100
- Enrollment
- 360
- Students per teacher
- 10.3:1
- Resource Index
- 49/100
- Enrollment
- 340
- Students per teacher
- 9.7:1
- Resource Index
- 51/100
Similar other schools in Cambridge
6 comparable other schools (grades Mixed) serving the same city.
Prospect Hill Academy Charter School
Standard public school
890 students 8.4:1 students per teacher
Amigos School
Standard public school
413 students 10.9:1 students per teacher
Graham and Parks
Alternative education program
367 students 10.5:1 students per teacher
Maria L. Baldwin
Standard public school
360 students 10.3:1 students per teacher
Benjamin Banneker Charter Public School
Standard public school
352 students 17.6:1 students per teacher
Martin Luther King Jr.
Standard public school
340 students 9.7:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Massachusetts, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~391 students)
Similar student-teacher ratio (~10:1)
Next steps
Verify locally before acting on King Open's federal record.
- Compare King Open against another school. Compare schools
- Cambridge's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about King Open
How many students attend King Open?
King Open has 391 students enrolled. It is an alternative school in Cambridge, MA.
What is the student-teacher ratio at King Open?
The student-teacher ratio at King Open is 10:1, which is 19% lower than the Massachusetts average of 12.3:1 and 36% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of King Open?
The largest demographic group at King Open is White at 32.7% of enrollment, in Cambridge, MA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 77.2/100.
What is the Resource Investment Index for King Open?
King Open has a Resource Investment Index of 32/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does King Open rank among schools in Cambridge?
By Resource Investment Index, King Open ranks #15 of 15 schools in Cambridge, MA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Cambridge on the city page.
Is King Open a good school?
King Open earns 32/100 on the Resource Investment Index, with class sizes smaller than 80% of Massachusetts schools. It is also more racially and ethnically mixed than most Massachusetts schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Cambridge?
Besides King Open, Cambridge also operates Cambridge Rindge and Latin (2,072 students), Amigos School (413 students), and Graham and Parks (367 students). See the Cambridge district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.