CREATE TABLE table_26253 ("Year" TEXT, "District-wide" FLOAT, "High schools" FLOAT, "Middle schools" FLOAT, "Elementary schools" FLOAT, "Other programs & adjustments" FLOAT)

Name the most district wide for 1639 other programs
SELECT MAX("District-wide") FROM table_26253 WHERE "Other programs & adjustments" = '1639'
SELECT MAX("District-wide") FROM "table_26253" WHERE "Other programs & adjustments" = '1639'