← All proof trees · M. WASHINGTON ACADEMICS PLUS

1. 1
   What you seeKeystone Algebra I proficiency

   8.0%

   the share of students scoring proficient or advanced on the Keystone Algebra I end-of-course exam.

   vs. peers

   63th percentile

   vs. citywide

   59th percentile

   unit

   percent

   direction

   higher is better

2. 2
   How it was computedvalue = the state's published percentage for the school × subgroup, as-is

   1. Read the state's wide-format datafile: one row per Pennsylvania school, one column per measure × subgroup (e.g. PercentPersistentAttendance_Black).
   2. Keep Philadelphia rows by mapping the state's AUN + Schl codes to the district's ULCS code through the Master School List.
   3. Unpivot each recognized measure × subgroup column into one served cell; state suppression codes ('IS', '--', '*') are stored as suppressed.

   Citywide percentile, reconstructed right now

   Among 268 default-included schools with a value for this metric, year, and subgroup, this school has a higher value than 157 and ties 2. Midrank rule: (157 + 2/2) / (268 − 1) = 0.592.Stored: 0.592. ✓ 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 24 and ties 2 of them. Midrank: (24 + 2/2) / (41 − 1) = 0.625; stored 0.625. ✓ matches

   The peers and their values (40)

   Peer school	Value
   LAURA W. WARING SCHOOL	19.5%
   JENKS ACADEMY ARTS & SCIENCES	16.3%
   LEWIS C CASSIDY ACADEMICS PLUS	14.9%
   WILLIAM D. KELLEY SCHOOL	14.8%
   JAMES G. BLAINE SCHOOL	14.7%
   PENROSE SCHOOL	14.4%
   ALAIN LOCKE SCHOOL	14.3%
   GEN. GEORGE G. MEADE SCHOOL	12.5%
   A.D. HARRINGTON SCHOOL	10.2%
   GUION S. BLUFORD ELEMENTARY SCHOOL	9.9%
   PAUL L. DUNBAR SCHOOL	9.1%
   JAMES R. LUDLOW SCHOOL	9.0%
   MORTON MC MICHAEL SCHOOL	8.3%
   SAMUEL PENNYPACKER SCHOOL	8.1%
   ANDREW HAMILTON SCHOOL	8.0%
   OVERBROOK ELEMENTARY SCHOOL	8.0%
   FRANKLIN S. EDMONDS SCHOOL	7.9%
   JAMES RHOADS SCHOOL	6.6%
   TANNER DUCKREY SCHOOL	6.3%
   ROBERT MORRIS SCHOOL	6.1%
   KENDERTON ELEMENTARY	5.8%
   COOKE ELEMENTARY SCHOOL	4.6%
   DELAPLAINE MCDANIEL SCHOOL	3.7%
   ROOSEVELT ELEMENTARY SCHOOL	3.1%
   JOHN BARRY ELEMENTARY SCHOOL	3.0%
   BENJAMIN B. COMEGYS SCHOOL	2.9%
   ANNA B. DAY SCHOOL	2.9%
   SAMUEL GOMPERS SCHOOL	2.8%
   ROBERT E. LAMBERTON ELEMENTARY	2.1%
   RHODES ELEMENTARY SCHOOL	1.3%
   DR. ETHEL ALLEN SCHOOL	0.0%
   RUDOLPH BLANKENBURG SCHOOL	0.0%
   GEN. PHILIP KEARNY SCHOOL	0.0%
   WILLIAM C. LONGSTRETH SCHOOL	0.0%
   MITCHELL ELEMENTARY SCHOOL	0.0%
   EDWARD T. STEEL SCHOOL	0.0%
   EDWARD GIDEON SCHOOL	0.0%
   JOHN F. MCCLOSKEY SCHOOL	0.0%
   ADD B. ANDERSON SCHOOL	0.0%
   WILLIAM DICK SCHOOL	0.0%

   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: Keystone Algebra I proficiency

3. 3
   The stored cellThe stored cell

   table

   philly_school_year_metrics

   value

   8

   denominator

   null (not published)

   suppressed

   false

   citywide_percentile

   0.5918

   comparison_group_percentile

   0.6250

   source_load_id

   8ba7d9e6-a94a-4a6f-9e9b-ceb2707d43de

   Evidence: data model overview

4. 4
   The load that wrote itWritten on 2026-09-08 by futurereadypa_performance.ts

   source id

   futurereadypa_performance_2024-25

   file URL

   https://futurereadypa.org/home/getdatafile?id=60

   SHA-256 of the file read

   a16ffc40e7d1851d5ac83dd63d8ca5348ead064e029bade593a0182ed085bc92Copy hash

   bytes

   5,113,152

   year covered

   2024-25

   code commit

   c19ea6ec845c65bcc40eb49644be1c7e67b05f25

   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 fileFuture Ready PA Index datafile, 2024-25

   Pennsylvania Department of Education (Future Ready PA Index). The state's school-level accountability indicators for every public school in Pennsylvania — test proficiency, growth (PVAAS), persistent attendance, graduation — by subgroup.

   format

   XLSX (wide: one column per measure × subgroup)

   join key

   AUN + Schl (state IDs), mapped to ULCS via the Master School List

   landing page

   https://futurereadypa.org/Home/DataFiles

   • The chronic-absenteeism column exists in the file but is empty for individual Philadelphia schools; the state reports persistent attendance instead.
   • Publishes no student counts for the attendance measure.
   • Its 90%-attendance figure does not match the district's for the same schools (see the cross-publisher check).
6. 6
   How it was checkedChecks: 1 passed, 1 flagged

   • ✓ passedBase case (district file, 2024-25): 54 of 54 unsuppressed cells match
   • ⚠ flaggedCross-publisher sanity check (state vs district)

   Checked at ±1: 0 mismatches, 0 cells served but absent from the file, 0 in the file but not served (ALL, acct, latest year).

   Evidence: Base case (district file, 2024-25) · Cross-publisher sanity check (state vs district)

7. 7
   Assumptions & caveatsAssumptions and caveats

   • The state's AUN + Schl → ULCS mapping from the 2024-25 Master School List is correct. State rows for schools not in that directory — district schools that closed before 2024-25 — are not loaded, so every year of state data is a survivor-only panel; cyber charters have their own AUNs and are outside the district's directory.
   • Where two directory schools share a state code (a school and its Continuation Academy), the state's single row belongs to the main school (deterministic rule; the full absenteeism QA lists every shared code).

   • Served from both the district's file (district-run schools) and the state's file (all schools); check the load record on a cell to see which.

   Algorithms involved: Reading the state's wide-format datafile, Citywide and peer-group percentiles, Peer groups: 40 nearest neighbors on demographics