I have been leading a study (and begin another this Sunday) on the Sermon on the Mount. The Sermon on the Mount is a study about a section in the gospel of Matthew (chapters 5-7)where Jesus lays out several challenges about what it means to be his disciple. Even if you are not familiar with Scripture, you might be familiar with several images and quotes from the beginning of Jesus's teaching ministry in the Gospel of Matthew.
Such quotes include:
"Blessed are the meek"
"Blessed are the peacemakers"
"salt of the earth"
"you are a city on a hill"
"turn the other cheek"
"rain falls on the just and unjust"
"don't toot your own horn" (paraphrase of Matt. 6:5)
"you can't serve two masters"
"judge not that you be not judged"
"do for others as you would like done unto you"
"consider the lillies of the field"
"knock and the door will be opened"
Anyway, I have been teaching a 6 week series on this section of Scripture, and have found one book to be the most helpful in both understanding the text, and in helping me with ideas on how to teach what Jesus said to people. That commentary has been the Christbook. The Christbook was written by F. Dale Bruner while he was a professor at Whitworth College in Spokane, WA. It is excellent because it gives lots of teaching hints, in depth study, as well as historical background in the interpretation of each verse. There are several reviews of the commentary, and now it is revised and updated. The best Bible commentary I have ever read.