CREATE TABLE table_73719 ("Year" TEXT, "Superintendent" TEXT, "Middlesex Principal" TEXT, "Gorham Principal" TEXT, "Middle School Principal" TEXT, "High School Principal" TEXT)

How many middlesex principals were there in 2000-2001?
SELECT COUNT("Middlesex Principal") FROM table_73719 WHERE "Year" = '2000-2001'
SELECT COUNT("Middlesex Principal") FROM "table_73719" WHERE "Year" = '2000-2001'