CREATE TABLE table_73721 ("Year" CLOB, "Superintendent" CLOB, "Middlesex Principal" CLOB, "Gorham Principal" CLOB, "Middle School Principal" CLOB, "High School Principal" CLOB)

Who were the middle school principal(s) in 2010-2011?
SELECT "Middle School Principal" FROM table_73721 WHERE "Year" = '2010-2011'
SELECT "Middle School Principal" FROM "table_73721" WHERE "Year" = '2010-2011'