Enrollment
391
Elementary
DISTRICT 315 · STATE 381
SCHOOL COMMUNITY·CAMBRIDGE·NCES 250327000228
King Open
850 Cambridge Street, Cambridge, MA 02139 · (617) 349-6540 · Middlesex County
GRADES PK–05ELEMENTARY12-CITYALTERNATIVE EDUCATION SCHOOL391 STUDENTS
·
allk12 Grade
Not graded
Schools serving specialized populations are not graded, because state test results are not a fair comparison for them. How grades work
Student : Teacher
10.4:1
37 FTE teachers
DISTRICT 9.9:1 · STATE 12.2:1
Free / Reduced Lunch
,
Title I proxy
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 | 28 | 7% |
| Kindergarten | 66 | 17% |
| Grade 1 | 63 | 16% |
| Grade 2 | 67 | 17% |
| Grade 3 | 63 | 16% |
| Grade 4 | 54 | 14% |
| Grade 5 | 50 | 13% |
This year's kindergarten class (66) is 32% larger than its 5th grade class (50).
Student demographics
77%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 76% · STATE 65% · 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
MCAS 2024-25 . % Meeting or Exceeding ExpectationsEnglish Language Arts
44.0%
own-school result
Math
42.0%
own-school result
State assessment results for this school reflect a specialized student population. The figures above are the school's own reported scores; they are not directly comparable to state averages or to general-enrollment schools, so the usual state-average comparison line is suppressed here.
MCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 44.0% | 42.0% |
| 2023-24 | 48.0% | 47.0% |
| 2022-23 | 36.0% | 40.0% |
| 2021-22 | 39.0% | 34.0% |
| 2020-21 | 52.0% | 28.0% |
| 2018-19 | 56.0% | 43.0% |
| 2017-18 | 56.0% | 46.0% |
| 2016-17 | 54.0% | 47.0% |
% Meeting or Exceeding Expectations, all students and all tested grades.
Source: MCAS. All students, all grades. See all years and grades →
BeatsExpectations
Not computed for this schoolBeatsExpectations is not computed for specialized-population schools (schools for the deaf or blind, therapeutic and behavioral-health placements, juvenile-justice and alternative-education settings, and similar). State ELA/Math proficiency rates are not a comparable metric for these populations, so a demographically-adjusted residual against general-enrollment peers would be misleading. About the methodology →
Where King Open ranks
Among elementary schools| Measure | This school | In Massachusetts | In Middlesex County |
|---|---|---|---|
| Enrollment ranked largest first | 391 | #463 of 1,086 | #123 of 238 |
| Students per teacher ranked fewest first | 10.4:1 | #163 of 938 | #45 of 222 |
| Diversity index ranked most diverse first | 77.2% | #2 of 938 | #1 of 222 |
| Enrollment change since 2017-18 ranked fastest growth first | +18.8% | #61 of 317 | #14 of 77 |
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
391
+33 (+9%) vs 2020
+21% since 2000-01, when it was 322
Student : Teacher
10.4:1
was 8.7:1
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 | 391 | 37.5 | 10.4:1 | N/A |
| 2023-24 | 387 | 41 | 9.4:1 | N/A |
| 2022-23 | 371 | 39.5 | 9.4:1 | N/A |
| 2020-21 | 358 | 41 | 8.7:1 | N/A |
| 2017-18 | 329 | 34.9 | 9.4:1 | N/A |
| 2015-16 | 320 | 33 | 9.7:1 | N/A |
| 2010-11 | 493 | 41 | 12.0:1 | 41% (203) |
| 2000-01 | 322 | N/A | N/A | 21% (69) |
Source: NCES Common Core of Data. Rows are the federal collections on file for King Open.
Since 2017-18: students up 19% (329 to 391); teachers up 7% (34.9 to 37.5).
About King Open
King Open is a mid-sized elementary school with an address in Cambridge, Massachusetts. The school runs pre-K through 5 and enrolls 391 students.
Enrollment across the 17 schools in Cambridge totals 7,027 students.
About 33% of students at King Open are White, the largest single group. It is also 24% Black, 17% Hispanic, 15% multiracial, and 11% Asian. Middlesex County's residents are about 67% White, 34 points above the school's share. On a 0 to 100 scale, the school's diversity index is 77, compared with 70 nationally.
Teacher count: 37.5 full-time equivalents. Student-to-teacher ratio: 10.4:1. The average for elementary schools in Massachusetts, 12.2:1, is higher.
The school's county is Middlesex County. According to Census Bureau estimates, the median household earns about $130,847 a year, a bachelor's degree or higher is held by about 60% of adults, and the poverty rate is about 5%. King Open shares Middlesex County with 385 other public schools.
Less than a tenth of a mile separates King Open from the closest public school, Cambridge Street Upper School. Other public schools within five miles: at least 8.
Federal records code the school's setting as City: Mid-size.
In 2024-25, the school enrolled 391, up from 358 in 2020-21. The school's ratio increased from 8.7:1 to 10.4:1 between 2020-21 and 2024-25.
This community page is for conversations about fundraisers, report cards, and school supplies. You can also rate the school on this page.
Middlesex County at a glance
View full county profilePopulation
1,638,365
Census ACS
Median income
$130,847
Household, ACS
Bachelor's+
60%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
386
215,896 students
Quick facts
Related schools
Other schools in Cambridge
- Cambridge Rindge and LatinHigh · 2,072 students
- Amigos SchoolElementary · 413 students
- Graham and ParksElementary · 367 students
- Maria L. BaldwinElementary · 360 students
- Martin Luther King Jr.Elementary · 340 students
- MorseElementary · 328 students
Other schools in Cambridge
- Cambridge Rindge and LatinHigh · 2,072 students
- Prospect Hill Academy Charter SchoolCombined · 890 students
- Amigos SchoolElementary · 413 students
- Graham and ParksElementary · 367 students
- Maria L. BaldwinElementary · 360 students
- Benjamin Banneker Charter Public SchoolElementary · 352 students
Nearby schools
- Cambridge Street Upper School0.0 mi · 301
- Kennedy-Longfellow0.3 mi · 215
- Vassal Lane Upper School0.3 mi · 298
- Cambridgeport0.4 mi · 263
- Fletcher/Maynard Academy0.4 mi · 249
- Community Charter School of Cambridge0.4 mi · 251
Frequently asked questions
About King OpenHow many students attend King Open?
King Open enrolls approximately 391 students in grades PK-05.
What age range does King Open serve?
King Open serves students from grade PK through grade 05.
How many students per teacher at King Open?
Approximately 10.4:1 students per teacher at King Open.
How diverse is King Open?
King Open reports a student body of 33% White, 17% Hispanic, 24% Black, 11% Asian, 15% Two or more.
What district is King Open in?
King Open is part of Cambridge.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.