@Carla: Years ago, when there were 5 full-hour length meetings (Plus song and prayers), most congs' Thursday night meetings were 'The Theocratic Ministry School' and 'The Service Meeting'.
As best I recall, the TMS consisted of 5 talks randomly rotated among the enrolled students.
Talk #1: Instruction Talk - always given by a male, usually an elder or ministerial servant. This talk was training for Public Talks given on Sundays. (10 or 15 minutes, I think.)
Talk #2: Bible Reading - always given by a male, usually a young child or a newly interested man (usually not yet an MS). It was a sequential reading of about a page in the bible with an introduction, reflection/explanation in the middle, and a conclusion. (5 or 6 minutes)
Talk #3: Skit depicting/exemplifying discussion/impromptu preaching to an acquaintance - always given to a female of any age and any degree of JW maturity. The talk was assigned to a female student and a specific 'householder' (always a female student) was also designated. The assignee had to review the assigned material, come up with a setting for discussion and then write a script (or outline) for the 2 women/girls. The talk had to have a clear intro, a theme, and a conclusion.
Talk #4: Same as #3 but might be re-assigned to a male to handle same as #5.
Talk #5: [Mini Sermon. I forget the real name.] - always given by a male, usually an MS or well-experienced (advance) TMS student. (5 or 6 minutes)
Timing/Length of each talk was critical. Students were expected to conclude within 10 seconds of the allotted time. If not, it was noted from the platform by the School Overseer in the public counsel given immediately after each talk.
Attire: Proper Christian Attire was required. It was one of the 20 or 30 counsel points. For women, improper length of dress and modesty could result in being replaced at the last minute by someone else (or the School Overseer himself).
At some point, I think the school was reduced to just 4 talks. I also seem to recall that talks 2-5 originally were 6 minutes and then reduced to 5 minutes. But I could be wrong. It's been awhile.