← All proof trees

1. 1
   How it was computedvalue = published 4-year cohort graduation rate (district file, indexed by cohort entry year; state file, indexed by report year)

   1. Read the district's graduation CSV (all cohorts, 4/5/6-year rates, by subgroup) and store by cohort year.
   2. The state's Future Ready file also carries a 4-year rate for every school including charters; it is stored under the same key but indexed by report year.

   Algorithms applied downstream: Citywide and peer-group percentiles, Peer groups: 40 nearest neighbors on demographics

2. 2
   The load that wrote it5 data loads wrote this metric

   Loaded	Source file	Years	Cells	Suppressed	File hash	Commit
   2026-09-08	futurereadypa_performance_2024-25	2024-25	3,278	2,827	a16ffc40e7d1…	c19ea6ec
   2026-09-08	futurereadypa_performance_2023-24	2023-24	3,278	2,816	89219f7a7ffb…	c19ea6ec
   2026-09-08	futurereadypa_performance_2022-23	2022-23	3,267	2,827	81fdf381405c…	c19ea6ec
   2026-09-08	futurereadypa_performance_2021-22	2021-22	3,234	2,579	4efe1b1b120f…	c19ea6ec
   2026-06-04	sdp_graduation_school_2014-2025	2010-11, 2011-12, 2012-13, 2013-14, 2014-15, 2015-16, 2016-17, 2017-18, 2018-19, 2019-20, 2020-21, 2021-22	11,176	5,766	8ae3969118c3…	f75e3313

   The hash identifies the exact file version read; the commit identifies the exact code. Both are recorded at load time.

   Evidence: futurereadypa_performance.ts · sdp_graduation.ts

3. 3
   The publisher's file5 publisher files

   Future 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).

   Future Ready PA Index datafile, 2023-24 — 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.

   Future 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.

   Future Ready PA Index datafile, 2021-22 — 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.

   Graduation rates by cohort, 4/5/6-year — School District of Philadelphia (Performance Office). Four-, five-, and six-year cohort graduation rates by school and subgroup, indexed by the cohort's 9th-grade entry year.

   format

   CSV

   join key

   ULCS Code

   landing page

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

   • Indexed by cohort start year, not graduation year; the state's Future Ready file indexes the same rate by report year.

   Evidence: source registry (sources.yaml) · futurereadypa_performance_2024-25: first-fetch findings · futurereadypa_performance_2023-24: first-fetch findings · futurereadypa_performance_2022-23: first-fetch findings · futurereadypa_performance_2021-22: first-fetch findings · sdp_graduation_school_2014-2025: first-fetch findings

4. 4
   How it was checkedChecks: 2 passed

   • ✓ passedBase case (district file, 2021-22 cohort): 75 of 75 unsuppressed cells match
   • ✓ passedCompleteness

   compared

   81 cells (All students, n/a)

   tolerance

   ±0.5

   mismatches

   0

   served only

   0

   source only

   1

   Year	Cut	Source cells	Served cells	Source-only	Served-only
   2021-22	n/a	82	81	1	0

   Evidence: Base case (district file, 2021-22 cohort) · Completeness

5. 5
   Assumptions & caveatsAssumptions and caveats

   Assumptions

   • The two publishers' rows never collide on (school, year, subgroup) because they use different year conventions; readers must check which convention a given year follows.

   Caveats

   • Two year conventions coexist under one key — a known v1 wart flagged for normalization.

To see the tree for one school’s number, click any dotted-underlined figure on a school, Outliers, or Movers page.