← All proof trees · FIRST PHILADELPHIA CHARTER

1. 1
   What you see4-year cohort graduation rate

   100.0%

   the four-year cohort graduation rate: the share of a 9th-grade entry cohort that graduated within four years.

   vs. peers

   88th percentile

   vs. citywide

   93th percentile

   unit

   percent

   direction

   higher is better

2. 2
   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.

   Citywide percentile, reconstructed right now

   Among 84 default-included schools with a value for this metric, year, and subgroup, this school has a higher value than 72 and ties 11. Midrank rule: (72 + 11/2) / (84 − 1) = 0.934.Stored: 0.934. ✓ 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-High / lottery / charter schools; 12 of 13 peers have a value this year. This school is above 9 and ties 3 of them. Midrank: (9 + 3/2) / (13 − 1) = 0.875; stored 0.875. ✓ matches

   The peers and their values (12)

   Peer school	Value
   SANKOFA FREEDOM ACADEMY	100.0%
   PHILA PERFORMING ARTS-BROAD ST	100.0%
   MATH, SCIENCE AND TECHNOLOGY	100.0%
   TACONY ACADEMY CHARTER SCHOOL	98.1%
   HARDY WILLIAMS ACADEMY CHARTER	96.2%
   ESPERANZA ACADEMY CHARTER	95.8%
   MARIANA BRACETTI ACADEMY	95.3%
   MARITIME ACADEMY CHARTER	94.6%
   MASTERY CHARTER-THOMAS CAMPUS	92.5%
   NEW FOUNDATIONS CHARTER SCHOOL	89.0%
   COMMUNITY ACADEMY OF PHILA	86.4%
   PHILADELPHIA ACADEMY	85.7%

   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: 4-year cohort graduation rate

3. 3
   The stored cellThe stored cell

   table

   philly_school_year_metrics

   value

   100

   denominator

   null (not published)

   suppressed

   false

   citywide_percentile

   0.9337

   comparison_group_percentile

   0.8750

   source_load_id

   2fdcb9ea-d4af-4a48-a7cf-a8e6166696b3

   Evidence: data model overview

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

   source id

   futurereadypa_performance_2023-24

   file URL

   https://futurereadypa.org/home/getdatafile?id=49

   SHA-256 of the file read

   89219f7a7ffbc6adc14f54e87f2872ab04ce12a9e0749c448cf54998e4930e90Copy hash

   bytes

   4,861,549

   year covered

   2023-24

   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, 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.
6. 6
   How it was checkedChecks: 2 passed

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

   Checked at ±0.5: 0 mismatches, 0 cells served but absent from the file, 1 in the file but not served (ALL, n/a, latest year).

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

7. 7
   Assumptions & caveatsAssumptions and caveats

   • 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.

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

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