{
  "analysis": "Executed NCES CCD directory sampling-frame feasibility audit; no participant study",
  "verifiedAt": "2026-10-16",
  "directoryArchiveSha256": "3910300771b1db27e0589d014451f95e3190ca71ab4dcabe06227224f58b4ecb",
  "directoryRows": 102274,
  "uniqueNCESSCH": 102274,
  "duplicateNCESSCH": 0,
  "malformedIdentifierCount": 0,
  "schoolYears": {
    "2023-2024": 102274
  },
  "updatedStatusCounts": {
    "1": 99594,
    "2": 1031,
    "3": 767,
    "4": 30,
    "5": 30,
    "6": 450,
    "7": 337,
    "8": 35
  },
  "requiredFieldBlankCounts": {
    "G_7_OFFERED": 0,
    "UPDATED_STATUS": 0,
    "G_8_OFFERED": 0,
    "SCH_TYPE": 0,
    "SCHOOL_YEAR": 0,
    "NCESSCH": 0,
    "LEAID": 0
  },
  "candidateFrameDefinition": {
    "UPDATED_STATUS": [
      "1",
      "3",
      "4",
      "5",
      "8"
    ],
    "SCH_TYPE": "1",
    "G_7_OFFERED": "Yes",
    "G_8_OFFERED": "Yes"
  },
  "candidateSchools": 29115,
  "candidateLEAs": 15223,
  "candidateLEAsWithAtLeastTwoSchools": 3049,
  "candidateSchoolsInLEAsWithAtLeastTwoSchools": 16941,
  "limitations": [
    "Historical administrative frame, not current recruitment eligibility or school consent.",
    "Directory contains no individual student records, belonging scores, cultural identity, cultural authorization or permissions.",
    "NCESSCH and LEAID are strings; names and truncated IDs are not linkage keys.",
    "Statuses are administrative categories, not independent observations of classroom operation.",
    "Selection requires confirmation against updated records, accessible curricula and governance agreements."
  ],
  "membershipAudit": {
    "archiveSha256": "06bd50eede0c036e4c92b6464b69f192ff3b8f9f739b403c2b218a9f6ec3e239",
    "rows": 11209338,
    "columns": [
      "SCHOOL_YEAR",
      "FIPST",
      "STATENAME",
      "ST",
      "SCH_NAME",
      "STATE_AGENCY_NO",
      "UNION",
      "ST_LEAID",
      "LEAID",
      "ST_SCHID",
      "NCESSCH",
      "SCHID",
      "GRADE",
      "RACE_ETHNICITY",
      "SEX",
      "STUDENT_COUNT",
      "TOTAL_INDICATOR",
      "DMS_FLAG"
    ],
    "descriptiveLongCellColumns": [
      "NCESSCH",
      "GRADE",
      "RACE_ETHNICITY",
      "SEX",
      "TOTAL_INDICATOR",
      "DMS_FLAG"
    ],
    "schoolTotalJoinRestriction": "TOTAL_INDICATOR == Education Unit Total",
    "schoolTotalRows": 99678,
    "uniqueSchoolTotalNCESSCH": 99678,
    "duplicateSchoolTotalNCESSCH": 0,
    "totalIndicatorCounts": {
      "Category Set A - By Race/Ethnicity; Sex; Grade": 8832918,
      "Derived - Education Unit Total minus Adult Education Count": 99678,
      "Derived - Subtotal by Race/Ethnicity and Sex minus Adult Education Count": 1495170,
      "Education Unit Total": 99678,
      "Subtotal 4 - By Grade": 681894
    },
    "fullLongCellDuplicateCheck": "Not performed; selected school-total uniqueness audited separately",
    "uniqueSchools": 99678,
    "schoolsAbsentFromDirectoryCount": 0,
    "dataManagementFlagCounts": {
      "Reported": 6897484,
      "Derived": 2371368,
      "Missing": 12421,
      "Manual adjustment": 1874348,
      "Not reported": 53567,
      "Suppressed": 150
    },
    "blankStudentCountByDataManagementFlag": {
      "Missing": 12421,
      "Not reported": 53567,
      "Suppressed": 150
    },
    "negativeValueCounts": {},
    "specialValueCounts": {
      "": 66138,
      "non_numeric": 66138
    },
    "interpretation": "Long records are grade/race/sex/category cells; never join on NCESSCH alone without choosing a cell. Negative or nonnumeric values remain unavailable, not zero. Race/ethnicity reporting categories are not cultural identities. Exact meanings of special codes require this release documentation."
  }
}