← All proof trees · OLNEY HIGH SCHOOL

1. 1
   What you seeOSS — % students with any suspension

   15.6%

   the share of a school's students with at least one out-of-school suspension in the year. Based on 45 students. For this measure, lower is better — percentiles below are flipped so that a high percentile is always the good outcome.

   vs. peers

   13th percentile

   vs. citywide

   12th percentile

   unit

   percent

   direction

   lower is better (percentiles are flipped so a high percentile is always good)

2. 2
   How it was computedvalue = 100 − published '% with Zero OS Suspensions'

   1. Read the district's suspensions CSV; keep directory schools and mapped subgroups.
   2. Derive the share with any suspension as 100 minus the published zero-suspension share.

   Citywide percentile, reconstructed right now

   Among 109 default-included schools with a value for this metric, year, and subgroup, this school has a better (lower) value than 13. Midrank rule: (13 + 0/2) / (109 − 1) = 0.120.Stored: 0.120. ✓ 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 High / catchment / district schools; 16 of 20 peers have a value this year. This school beats 2 of them. Midrank: (2 + 0/2) / (17 − 1) = 0.125; stored 0.125. ✓ matches

   The peers and their values (16)

   Peer school	Value
   BENJAMIN FRANKLIN HIGH SCHOOL	0.0%
   SAYRE HIGH SCHOOL	0.0%
   FRANKFORD HIGH SCHOOL	0.0%
   KENSINGTON HIGH SCHOOL	0.0%
   SAMUEL S. FELS HIGH SCHOOL	2.1%
   JOHN BARTRAM HIGH SCHOOL	5.9%
   OVERBROOK HIGH SCHOOL	7.1%
   WEST PHILADELPHIA HIGH SCHOOL	7.4%
   THOMAS EDISON HIGH SCHOOL	9.4%
   KENSINGTON CAPA	11.1%
   NORTHEAST HIGH SCHOOL	11.1%
   GEORGE WASHINGTON HIGH SCHOOL	12.3%
   ROXBOROUGH HIGH SCHOOL	14.3%
   ABRAHAM LINCOLN HIGH SCHOOL	14.6%
   VAUX BIG PICTURE HIGH SCHOOL	23.1%
   STRAWBERRY MANSION HIGH SCHOOL	30.0%

   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: OSS — % students with any suspension

3. 3
   The stored cellThe stored cell

   table

   philly_school_year_metrics

   value

   15.56

   denominator

   45

   suppressed

   false

   citywide_percentile

   0.1204

   comparison_group_percentile

   0.1250

   source_load_id

   9ed07178-853d-4052-aa83-1bfe11ce1d24

   Evidence: data model overview

4. 4
   The load that wrote itWritten on 2026-06-04 by sdp_attendance_and_suspensions.ts

   source id

   sdp_suspensions_school

   file URL

   https://cdn.philasd.org/offices/performance/Open_Data/School_Performance/Suspensions/SDP_OSS_School_S_20260213.csv

   SHA-256 of the file read

   6eaa8e3907d80e2572464dbcef793fafb312567cdfa120f3a4820f08fca517c4Copy hash

   bytes

   2,057,896

   year covered

   —

   code commit

   f75e33137e8166eec3f8b5a4b39463d306ef710c

   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 fileOut-of-school suspensions, by school and year

   School District of Philadelphia (Performance Office). For each school and year, the share of students with 0, 1, 2, and 3 out-of-school suspensions, by subgroup.

   format

   CSV

   join key

   ULCS Code

   landing page

   https://opendataphilly.org/datasets/sdp-school-performance/

   • No published '4 or more' column — derived as a residual (see the suspensions algorithm).
6. 6
   How it was checkedChecks: 1 passed

   • ✓ passedComputed-value check: 8,034 of 8,034 derived cells match an independent recomputation

   Evidence: Computed-value check

7. 7
   Assumptions & caveatsAssumptions and caveats

   • The published percentages for 0/1/2/3 suspensions are of the same denominator ('Total Students (Yearly)').

   • District-run schools only.

   Algorithms involved: Suspension shares derived from the published 0/1/2/3 columns, Citywide and peer-group percentiles, Peer groups: 40 nearest neighbors on demographics