Are you looking for some user friendly, clear, and purposeful training resources for your Sunday School Leaders?  Check out these:

1.  Sunday School Done Right by Allan Taylor.  He is the Minister of Ed at First Woodstock, GA.  He is certainly fired up about Sunday School.

2.  Power Up Your Sunday School by Bob Mayfield, state Sunday School Leader for Oklahoma.  Bob is the real deal, and he is passionate about people finding a relationship with Jesus Christ.

Most of all, remember with whatever you use, as the leader, your enthusiasm and passion will communicate most powerfully!