CREATE TABLE table_19445 ("School Year" TEXT, "Class A" TEXT, "Class AA" TEXT, "Class AAA" TEXT, "Class AAAA" TEXT, "Class AAAAA" TEXT)

What are all the school years where class AAAA is in Gregory-Portland?
SELECT "School Year" FROM table_19445 WHERE "Class AAAA" = 'Gregory-Portland'
SELECT "School Year" FROM "table_19445" WHERE "Class AAAA" = 'Gregory-Portland'