CREATE TABLE table_19428 ("School Year" CLOB, "Class A" CLOB, "Class AA" CLOB, "Class AAA" CLOB, "Class AAAA" CLOB, "Class AAAAA" CLOB)

Who was the Class AAAA champion in 2006-07?
SELECT "Class AAAA" FROM table_19428 WHERE "School Year" = '2006-07'
SELECT "Class AAAA" FROM "table_19428" WHERE "School Year" = '2006-07'