← All proof trees · JOHN M. PATTERSON SCHOOL

1. 1
   What you seePVAAS growth — Algebra I

   76.00

   the state's PVAAS growth index for math/Algebra I.

   vs. peers

   18th percentile

   vs. citywide

   38th percentile

   unit

   index (publisher's scale)

   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 259 default-included schools with a value for this metric, year, and subgroup, this school has a higher value than 94 and ties 8. Midrank rule: (94 + 8/2) / (259 − 1) = 0.380.Stored: 0.380. ✓ 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 / catchment / district schools; 33 of 40 peers have a value this year. This school is above 5 and ties 2 of them. Midrank: (5 + 2/2) / (34 − 1) = 0.182; stored 0.182. ✓ matches

   The peers and their values (33)

   Peer school	Value
   ROWEN SCHOOL	100.00
   THOMAS G. MORTON SCHOOL	100.00
   SAMUEL POWEL SCHOOL	100.00
   JOSEPH PENNELL ELEMENTARY	100.00
   JOHN B. KELLY SCHOOL	100.00
   KENNEDY C. CROSSAN SCHOOL	100.00
   JAMES LOGAN SCHOOL	100.00
   LAURA H. CARNELL SCHOOL	100.00
   RICHARD WRIGHT SCHOOL	100.00
   PRINCE HALL SCHOOL	100.00
   EDWIN FORREST SCHOOL	99.00
   JAMES R. LOWELL SCHOOL	97.00
   JAMES J. SULLIVAN SCHOOL	96.00
   LEWIS ELKIN SCHOOL	95.00
   HOWE ACADEMICS PLUS SCHOOL	95.00
   ANNE FRANK SCHOOL	92.00
   THOMAS M. PEIRCE SCHOOL	91.00
   SOLOMON SOLIS-COHEN SCHOOL	90.00
   ELLWOOD SCHOOL	89.00
   HENRY W. LAWTON SCHOOL	84.00
   ELEANOR C. EMLEN SCHOOL	82.00
   JOHN H. WEBSTER SCHOOL	82.00
   J. HAMPTON MOORE SCHOOL	82.00
   STEPHEN GIRARD SCHOOL	81.00
   JOSEPH W. CATHARINE SCHOOL	78.00
   CAYUGA SCHOOL	77.00
   FOX CHASE SCHOOL	76.00
   FELTONVILLE INTERMEDIATE	76.00
   FRANCES E. WILLARD SCHOOL	73.00
   RHAWNHURST SCHOOL	72.00
   GLORIA CASAREZ ELEMENTARY SCHOOL	70.00
   JOHN MARSHALL SCHOOL	68.00
   ALEXANDER MCCLURE SCHOOL	60.00

   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: PVAAS growth — Algebra I

3. 3
   The stored cellThe stored cell

   table

   philly_school_year_metrics

   value

   76

   denominator

   null (not published)

   suppressed

   false

   citywide_percentile

   0.3798

   comparison_group_percentile

   0.1818

   source_load_id

   e032c169-8d6b-41ae-acc1-d1662894df3e

   Evidence: data model overview

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

   source id

   futurereadypa_performance_2022-23

   file URL

   https://futurereadypa.org/home/getdatafile?id=44

   SHA-256 of the file read

   81fdf381405cc672abedc15bd58df21600418ca60df5c72dcf5e865581afb79dCopy hash

   bytes

   4,888,926

   year covered

   2022-23

   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, 2022-23

   Pennsylvania Department of Education (Future Ready PA Index). Same structure as the 2024-25 file.

   format

   XLSX (wide)

   join key

   AUN + Schl → ULCS

   landing page

   https://futurereadypa.org/Home/DataFiles

   • Same as 2024-25.
6. 6
   How it was checkedChecks: 0 passed, 1 not run

   • ○ not runBase case against the state file not yet run for this metric (the loader is shared with keystone_algebra_proficiency, whose SDP-side base case passed)
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).

   • The state publishes no student counts for most measures, so served cells carry no denominator.

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