CREATE TABLE table_33766 ("Chapter" TEXT, "Chartered" TEXT, "School" TEXT, "State" TEXT, "Status" TEXT, "Charter Range" TEXT)

Which chapter was active from 1906-1991?
SELECT "Chapter" FROM table_33766 WHERE "Charter Range" = '1906-1991'
SELECT "Chapter" FROM "table_33766" WHERE "Charter Range" = '1906-1991'