When it comes to your adult education ministries, sometimes it's just as important to help your congregation understand why you offer educational opportunities for adults as it is to advertise what your congregation is doing.
Here's a quick little blurb I have used in a church newsletter for this purpose. (Unfortunately, I no longer have a note that indicates whether I originally wrote it or whether I borrowed/adapted it from somewhere. If you recognize it, please let me know so I may give credit where it's due!) This pretty succinctly states what I believe to be true about adult educational ministries. I encourage you to write your own statement which fits your own congregation and your vision for Christian education.