I can remember those written reviews. You got them in the Kingdumb Misery inserts (potential to cheat on them). Of course, when you got to the Kingdumb Hell that night, you were supposed to write the answers on a separate sheet of paper. You were allowed to use the Bible but nothing else during the review. Of course, if you gave answers based solely on the Bible and not on Puketower litter-ature, you would get them wrong.
I remember taking those things. You had 20 minutes to complete them. And what a waste of time it was! I used to go through the ones I was sure of, and then complete the others. The ones I didn't know, I would guess at the end of the time. That had to be the biggest waste of them all. Then, you would switch papers and correct them. Later, they had us correct our own papers. I couldn't figure out the purpose of doing this (aside the possibility that an apostate might take it and put blatantly incorrect answers on it, and then the person correcting it would get the doubts sown in them).
Following this, they would go through the answers. That was a further waste. People in the audience were supposed to give the stock answers as comments, usually with little or no additional commentary. The conductor would give further commentary in the words of the Puketower Society. This was absolutely a waste of time, since there was no room for individual learning. The Tower has done all the thinking, and now they want us to recite it.
How it has changed, I am not familiar. They did change it to an oral review, to which I have never been to a single one. I can imagine it is another comment session where the people are asked the questions by the conductor and they poll the audience for the correct answers. To me, that would be even worse of a waste of time. No wonder no one shows up for those things!