For Moroni 4 I like to start out by asking them what verse of scripture they have probably heard more than any other in their life time. After some responses, hint towards one they hear weekly, said word for word… till they come up with the sacrament prayer. Then have them calculate how much a person, born in the church, may have heard it. Then say that since they have heard it so often, they probably really know it and hand out the fill in the blank for the prayer. To me, the main goal is that they walk out of class knowing what the 3 promises they commit to, by taking the sacrament bread, and they commit to themselves to think of those three promises each time they take the sacrament.
For Moroni 6, this anonymous survey is just to help them consider where their heart is with these areas that qualify them for Baptism. Although the outward baptism happened perhaps long ago, the inward aspect is something we should often recommit ourselves to.
For Moroni 10, this is a nice way to go over Moroni 10:3-5 and also sharing some favorites, as they look back on having studied the Book of Mormon this year. Have them share their favorites.