Hi N, sorry, i have no ideas as far as any specific topics and supporting verses are concerned, but what I've learnt about my own experience with study groups, is that they don't teach comprehensively enough. They pick a book and go through it too specifically, or pick a topic like love or faith, and find all the related passages, etc... i.e, too narrow, too slow, too dry.
I would start at the top, with an overview of the entire Bible, the books, the main characters, the Covenants, as chronologically as possible. Broadly enough that you can do this in 1 or 2 classes, repeating every month or so.
Talk broadly about the manuscript tradition enough that the students understand what they're dealing with as far as interpretation is concerned (textual criticism, variances, languages, formal equivalence vs dynamic vs paraphrase). Again, generalized enough for 1 or 2 classes, repeating as necessary.
Then, once they have a broad overview of, again, what they're dealing with and that they get the overall view in their head, they can pace and mentally prepare themselves better as you take on a deeper analysis of the sacred texts through the subsequent classes.
Just make sure the students have the overall picture in their head, that when you say Daniel, they think Babylon after captivity. When you say Joshua they think gaining the promised land and dividing the tribal territories. Samuel they think inauguration of Monarchy. Acts they think Pentecost and Gentiles into the kingdom, etc.
Not that they know these books and characters in detail, but just enough for the sake of orientation.
Then afterwards, get specific.