Biblical Training has a new class that will help you communicate the gospel in three different settings. The class is called Communicating the Gospel and is a combination of Gary Parrett's class on Christian Education, Bryan Chapell's class on preaching (which is also connected to his book on preaching), and Ron Pyle's class on small groups (which is soon to be posted).
I posted about this at my blog, adding some of my personal thoughts on redemptive-historical preaching, as well as a sermon that you must hear from Edmond Clowney. The reason I bring it up here is that the sermon is part of Chapell's class. It is lecture 25. I provide the links here if you are interested. Enjoy!