← All proof trees · WATSON COMLY SCHOOL

1. 1
   What you seeAverage daily attendance

   96.8%

   the school's year-to-date average daily attendance rate — the share of enrolled student-days actually attended.

   vs. peers

   98th percentile

   vs. citywide

   89th percentile

   unit

   percent

   direction

   higher is better

2. 2
   How it was computedvalue = published 'Average Daily Attendance (YTD)'

   1. Read the district's ADA CSV; keep directory schools; store the published rate (all students only).

   Citywide percentile, reconstructed right now

   Among 212 default-included schools with a value for this metric, year, and subgroup, this school has a higher value than 188. Midrank rule: (188 + 0/2) / (212 − 1) = 0.891.Stored: 0.891. ✓ 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; 40 of 40 peers have a value this year. This school is above 39 of them. Midrank: (39 + 0/2) / (41 − 1) = 0.975; stored 0.975. ✓ matches

   The peers and their values (40)

   Peer school	Value
   ANNE FRANK SCHOOL	97.6%
   WILLIAM H. LOESCHE SCHOOL	96.0%
   FOX CHASE SCHOOL	95.8%
   A.S. JENKS ACADEMICS PLUS SCH	94.9%
   RHAWNHURST SCHOOL	94.9%
   J. HAMPTON MOORE SCHOOL	94.5%
   SOLOMON SOLIS-COHEN SCHOOL	93.4%
   JOHN M. PATTERSON SCHOOL	93.1%
   KENNEDY C. CROSSAN SCHOOL	92.9%
   SAMUEL POWEL SCHOOL	92.1%
   FRANCIS SCOTT KEY SCHOOL	91.7%
   HACKETT SCHOOL	91.4%
   JOHN MOFFET SCHOOL	91.2%
   HENRY W. LAWTON SCHOOL	90.5%
   CAYUGA SCHOOL	90.4%
   JAMES LOGAN SCHOOL	90.3%
   EDWIN FORREST SCHOOL	90.3%
   HOWE ACADEMICS PLUS SCHOOL	89.9%
   CLARA BARTON SCHOOL	89.9%
   ELLWOOD SCHOOL	89.7%
   ROWEN SCHOOL	89.1%
   FELTONVILLE INTERMEDIATE	88.8%
   JOHN H. WEBSTER SCHOOL	88.5%
   RICHMOND SCHOOL	88.3%
   JAMES J. SULLIVAN SCHOOL	88.3%
   JOSEPH W. CATHARINE SCHOOL	88.2%
   JAMES R. LOWELL SCHOOL	87.9%
   LAURA H. CARNELL SCHOOL	87.8%
   GLORIA CASAREZ ELEMENTARY SCHOOL	87.7%
   LEWIS ELKIN SCHOOL	85.9%
   JOSEPH PENNELL ELEMENTARY	85.4%
   THOMAS G. MORTON SCHOOL	83.0%
   JOHN MARSHALL SCHOOL	82.7%
   STEPHEN GIRARD SCHOOL	82.7%
   ALEXANDER MCCLURE SCHOOL	82.6%
   WILLIAM CRAMP SCHOOL	81.8%
   BAYARD TAYLOR SCHOOL	81.7%
   FRANCES E. WILLARD SCHOOL	81.6%
   JOHN B. KELLY SCHOOL	80.7%
   ISAAC A. SHEPPARD SCHOOL	80.5%

   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: Average daily attendance

3. 3
   The stored cellThe stored cell

   table

   philly_school_year_metrics

   value

   96.81

   denominator

   null (not published)

   suppressed

   false

   citywide_percentile

   0.8910

   comparison_group_percentile

   0.9750

   source_load_id

   991bf9c1-3c0a-4123-a2e4-047cd97088e6

   Evidence: data model overview

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

   source id

   sdp_attendance_ada_school

   file URL

   https://cdn.philasd.org/offices/performance/Open_Data/School_Performance/Attendance/Student_ADA_Yearly_School_20260211.csv

   SHA-256 of the file read

   04e0893c5f84e6280c21682db3f653c2578ad68c7d12ded39f6e3f3165cb50c7Copy hash

   bytes

   59,816

   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 fileAverage daily attendance, by school and year

   School District of Philadelphia (Performance Office). Each school's year-to-date average daily attendance rate (share of enrolled days attended), all students only.

   format

   CSV

   join key

   ULCS Code

   landing page

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

   • District sector only.
6. 6
   How it was checkedChecks: 0 passed, 1 not run

   • ○ not runNo separate base-case report; same loader and file family as attendance_rate_above_90
7. 7
   Assumptions & caveatsAssumptions and caveats

   Stored as published; no modeling assumptions.

   • District-run schools only.
   • All-students figure only; no subgroups published.

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