I teach Sunday School at an evangelical congregation that is essentially nondenominational, but has various, historical ties to the Church of the Brethren and or one of the smaller Baptist denominations. The pastor has generally given me free reign to come up with my own material: I send him my slides after the fact as a courtesy and to allow him to offer any correction or guidance.
I have learned in this forum that not all Christian groups have a catechism in the same way that Lutherans do. My question is, do the Southern Baptists, American Baptist Association, or any other Baptist association have a common book that is relied on for instruction of youth in a similar way that Lutherans would have Luther's Small Catechism? If no, is there any standard of doctrine-- even a book of systematic theology, or works of a theological hero like Charles Spurgeon-- that is trusted for doctrinal clarification beyond the bible? If such a thing exists for "nondenominational evangelicals" and not Baptists, that's even better.