I also have the unfortunate "privilege" of being given this assignment too but on Wednesday night. I was hoping there was some discussion out here about this school part and what do you know! If the GB only knew about this wonderful interchange of ideas between us 'postates!
As a former elder who voluntarily resigned due to hypocrisy and power struggles within the local body, I have successfully faded enough over the past year or so to be relieved of all other assignments (cong. prayer, cong. reading, etc.) but for the wife's sake I still endure these dreadful school assignments. I have been having fun with these parts, though. I find that with a little thought you can subtly sneak in some good stuff that calls into question the JW view of things.
For example, I plan to point out the glaring absence of any direction from the 1st century GB over congregation matters in Paul's two letters to Timothy. The 'All Scripture' book, page 234 par. 5 states, "Paul wrote this first letter to Timothy to set out clearly certain organizational procedures in the congregation." Paul's 1st letter goes on to outline the qualifications of overseers and ministerial servants (1 Tim. 3:1-13). Where did Paul come up with this stuff? Where was the GB direction over Paul? I mean can we imagine a CO or DO unilaterily making policy like this irrespective of the GB today? Certainly not! His head would roll faster than Louis the XVI's. And yet Paul was not considered apostate or discredited by the first century Christian's - hmmmm.
I also can't resist raising the point about Paul's point that there is "... one mediator between God and men, a man, Christ Jesus, who gave himself a corresponding ransom for all...(1 Tim. 2:5,6). So, if a particular group of men try and set themselves up as a "mediator" between Chist and other humans - saying that no salvation can be had except through them, we can know that their doing so is not scriptural. Hopefully, most in the audience will connect the dots here.
There is a lot more you can do with this material if you think about it and are subtle. If the points made are scriptural what can anyone say to you?