← All proof trees · THOMAS HOLME SCHOOL

1. 1
   What you seeEnrollment

   1,574

   the school's October 1 enrollment (all grades).

   vs. peers

   73th percentile

   vs. citywide

   81th percentile

   unit

   count

   direction

   neither direction is 'better'

2. 2
   How it was computedvalue = Σ enrollment across the school's grade rows

   1. Read the district's enrollment file (one row per school × grade).
   2. Sum counts across grades to the school level.
   3. Divide the group count by total enrollment to get a share; storing shares re-derived from counts (rather than averaging per-grade percentages) weights grades by their size.

   Citywide percentile, reconstructed right now

   Among 330 default-included schools with a value for this metric, year, and subgroup, this school has a higher value than 266. Midrank rule: (266 + 0/2) / (330 − 1) = 0.809.Stored: 0.809. ✓ matches

   How percentiles are computed · How peer groups are chosen

   Peer percentile, reconstructed right now

   Peer group: up to 40 of the demographically nearest schools among Elementary-Middle / catchment / district schools; 40 of 40 peers have a value this year. This school is above 29 of them. Midrank: (29 + 0/2) / (41 − 1) = 0.725; stored 0.725. ✓ matches

   The peers and their values (40)

   Peer school	Value
   NORTHEAST COMMUNITY PROPEL ACADEMY	3,578
   MAYFAIR SCHOOL	3,532
   GILBERT SPRUANCE SCHOOL	2,516
   LOUIS H. FARRELL SCHOOL	2,378
   STEPHEN DECATUR SCHOOL	2,058
   ETHAN ALLEN SCHOOL	1,916
   SOUTHWARK SCHOOL	1,892
   JOSEPH GREENBERG SCHOOL	1,850
   HANCOCK DEMONSTRATION SCHOOL	1,790
   ROBERT B. POLLOCK SCHOOL	1,690
   A.L. FITZPATRICK SCHOOL	1,688
   HAMILTON DISSTON SCHOOL	1,480
   OLNEY ELEMENTARY SCHOOL	1,312
   GEN. GEORGE A. MCCALL SCHOOL	1,256
   THURGOOD MARSHALL SCHOOL	1,208
   BACHE-MARTIN SCHOOL	1,162
   BENJAMIN FRANKLIN ELEM. SCHOOL	1,142
   D. NEWLIN FELL SCHOOL	1,060
   BRIDESBURG SCHOOL	1,050
   WILLIAM H. ZIEGLER SCHOOL	1,044
   COPPIN, FANNY JACKSON SCHOOL	1,040
   ANDREW J. MORRISON SCHOOL	1,024
   ELIZA B. KIRKBRIDE SCHOOL	978
   JOHN H. TAGGART SCHOOL	968
   HENRY C. LEA SCHOOL	948
   SHAWMONT SCHOOL	914
   J.H. BROWN ACADEMICS PLUS SCHL	884
   GEORGE W CHILDS SCHOOL	874
   COOK-WISSAHICKON SCHOOL	828
   GEORGE W. NEBINGER SCHOOL	748
   ALLEN M. STEARNE SCHOOL	748
   MIFFLIN, THOMAS SCHOOL	720
   VARE-WASHINGTON ELEMENTARY	686
   MARIAN ANDERSON NEIGHBORHOOD ACADEMY	678
   H.A. BROWN ACADEMICS PLUS SCH	668
   GEORGE SHARSWOOD SCHOOL	656
   WILLIAM MCKINLEY SCHOOL	570
   SPRING GARDEN SCHOOL	472
   AMEDEE F. BREGY SCHOOL	464
   JAMES DOBSON SCHOOL	458

   Note: stored percentiles are computed by a batch script after loads; a difference from the live reconstruction means a newer load changed the comparison set and the batch has not been re-run.

   Evidence: metric tree: Enrollment

3. 3
   The stored cellThe stored cell

   table

   philly_school_year_metrics

   value

   1574

   denominator

   null (not published)

   suppressed

   false

   citywide_percentile

   0.8085

   comparison_group_percentile

   0.7250

   source_load_id

   f4c317af-16df-4cfe-8454-7b9361cd81cd

   Evidence: data model overview

4. 4
   The load that wrote itWritten on 2026-06-03 by sdp_enrollment_demographics.ts

   source id

   sdp_enrollment_demographics_school_2024-25

   file URL

   https://cdn.philasd.org/offices/performance/Open_Data/School_Information/Enrollment_Demographics_School/2024-2025%20Enrollment%20&%20Demographics.csv

   SHA-256 of the file read

   80f169f31c3e31f7f7a4d84138a46caa45f9b16162208c5b02784349fb2f133dCopy hash

   bytes

   492,606

   year covered

   2024-25

   code commit

   63ddc08c2a63170cecb6e78b991559cef9aa3926

   To confirm you have the same file: download it from the URL above, then run shasum -a 256 <downloaded file> Copy command — the output should equal the hash above. If the publisher has since replaced the file, the hashes will differ, which is itself useful to know.

   Evidence: loader script · first-fetch findings for this file · source registry

5. 5
   The publisher's fileEnrollment & Demographics, 2024-25

   School District of Philadelphia. October 1 enrollment counts by school and grade, with counts by race/ethnicity, gender, economic disadvantage, English-learner status, and special education.

   format

   CSV (one row per school × grade)

   join key

   ULCS Code

   landing page

   https://opendataphilly.org/datasets/sdp-school-enrollment-and-demographics/

   • Economic disadvantage is recorded as 100% at most district schools (community-eligibility meal reporting), so it can't distinguish schools.
6. 6
   How it was checkedChecks: 0 passed, 1 not run

   • ○ not runNo base-case report yet for demographics (aggregation is arithmetic on published counts; see the algorithm page)
7. 7
   Assumptions & caveatsAssumptions and caveats

   • October 1 enrollment is the reference population for the whole school year.

   • 2024-25 only.

   Algorithms involved: School demographic shares from per-grade counts