I have been in quite a few Jehovah's Witnesses meetings at their Kingdom Hall and am a bit intrigued about the meeting format.
All the Sunday meetings consist of a 30-minute talk (I take this would be referred to as a "sermon" in other denominations), given by an elder. This is followed by the Watchtower study which is like a question and answer session for the congregation on an article from the magazine.
Each magazine has about 4 study articles and so is used for during 4 weekend meetings. After that they go to the next magazine. The study articles in each magazine are on different biblical subjects, like faith/salvation/endurance, and so on.
For example last Sunday's Watchtower study was on the subject "Parents—Help Your Children Become “Wise for Salvation”", from this Watchtower magazine.
Below is an example of the questions that were discussed (from this page in the magazine). The easiest way to explain this format is by a video posted from another congregations meeting; this video of that meeting starts at the point where below paragraphs are discussed.
7, 8. (a) How does one Christian father show patience in teaching his daughter? (b) How have you found the need for similar patience?
7 Thomas, the father of an 11-year-old girl, relates: “My daughter might ask, ‛Could Jehovah have used evolution to develop life on earth?’ or, ‛Why don’t we get involved in the community—with elections, for example—to try to improve things?’ Sometimes I have to bite my tongue so as not to give a dogmatic answer. After all, conviction isn’t the result of one large chunk of truth. It comes from many small pieces of evidence.”
8 As Thomas knows, teaching takes patience. Actually, patience is important for all Christians. (Col. 3:12) Thomas realizes that there may be a need for many discussions over a period of time. He needs to reason on the Scriptures so that his daughter develops conviction about what she learns. “Especially on important points,” says Thomas, “my wife and I want to know if our daughter really believes what she is learning and if it makes sense to her. If she has questions, that’s good. Frankly, I would worry if she accepted something without asking questions.”
Are there other denominations that have this kind of a question/answer study format as standard part of their Sunday meeting, or is this more like typical to Jehovah's Witnesses?