Your son doesn't really have at talk. A couple years ago the society decided to have it at strictly reading from the bible and not saying a single word, introduction or conclusion about the scriptures. The faithful and discreet slave (matt 25) realized that reading about 20 scriptures together in context to the congregation and allowing the speaker to give an introduction and conclusion might allow them to bring out what those scriptures are really talking about vs what the GB wants people to think.
So now they just read the scripture, then they are graded on their reading ability like an 8 year old in school reading a page infront of the class. Sometimes they are fortunate to get a reading like Number 1:5-15, and must read it with much excitement and emphasis.