← All proof trees

1. 1
   How it was computedvalue = 100 × Σ group count / Σ enrollment across the school's grade rows

   1. Read the district's enrollment file (one row per school × grade).
   2. Sum counts across grades to the school level.
   3. Divide the group count by total enrollment to get a share; storing shares re-derived from counts (rather than averaging per-grade percentages) weights grades by their size.

   Algorithms applied downstream: School demographic shares from per-grade counts

2. 2
   The load that wrote it1 data load wrote this metric

   Loaded	Source file	Years	Cells	Suppressed	File hash	Commit
   2026-06-03	sdp_enrollment_demographics_school_2024-25	2024-25	330	0	80f169f31c3e…	63ddc08c

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

   Evidence: sdp_enrollment_demographics.ts

3. 3
   The publisher's fileEnrollment & Demographics, 2024-25

   Enrollment & Demographics, 2024-25 — School District of Philadelphia. October 1 enrollment counts by school and grade, with counts by race/ethnicity, gender, economic disadvantage, English-learner status, and special education.

   format

   CSV (one row per school × grade)

   join key

   ULCS Code

   landing page

   https://opendataphilly.org/datasets/sdp-school-enrollment-and-demographics/

   • Economic disadvantage is recorded as 100% at most district schools (community-eligibility meal reporting), so it can't distinguish schools.

   Evidence: source registry (sources.yaml) · sdp_enrollment_demographics_school_2024-25: first-fetch findings

4. 4
   How it was checkedChecks: 0 passed, 1 not run

   • ○ not runNo base-case report yet for demographics (aggregation is arithmetic on published counts; see the algorithm page)
5. 5
   Assumptions & caveatsAssumptions and caveats

   Assumptions

   • October 1 enrollment is the reference population for the whole school year.

   Caveats

   • 2024-25 only.

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