Who was the Class A winner in 2006-07?
CREATE TABLE "team" (
  "school_year" text,
  "class_a" text,
  "class_aa" text,
  "class_aaa" text,
  "class_aaaa" text,
  "class_aaaaa" text
);
SELECT "class_a" FROM "team" WHERE "school_year"='2006-07';