As a Bible study leader for two decades, I was well-taught the pre-tribulation rapture of the church. Believing in the Pre-Tribulation Rapture in my church was nearly mandatory - almost as foundational a doctrine as the Deity of Jesus. After being confronted to defend that position by a very kind Christian friend, I discovered that my pre-trib position didn't have a strong basis in Scripture. Not only that, but I found that I really didn't have a good handle on the terminology of the end times. Although I mostly deal in writing books to help people read and understand the Bible, I have recently embarked on writing a series of books that describe what might happen to the large body of "pre-tribbers" in the event that the Rapture happens after that time. The series also explores the possibility that the very Pre-Trib belief (and all that goes along with it) might actually be the springboard to usher in the end of the world.
Regarding the timing of the Rapture, I now teach what I believe: that you should be prepared because no one knows when that event will happen.