The (Ambassadors Of Christ) network (You Tube)
God has positioned Jarren (creator of this network) in such a way, so he can "pull" Biblical information and teach it, better than anyone I have found. He is not afraid to "tackle" the difficult questions, and is always careful to do thorough research.
Personally, I do not attempt to "teach" bible, so I do highly recommend watching his video's (especially "the Two Witnesses Movie), Jarren does an excellent job of researching and explaining difficult topics. Please support his ministry.