One gem I discovered within the last two months is to incorporate a paragraph or two from an "accessible" writer within the study. This gives students the a fresh voice which is neither Romans, nor myself; two voices which seem to tire out their thought processes.
Apart from the usual suspects such as C.S. Lewis, two authors which write in a way that the students understand and resonate with are Wayne Grudem & Richard J. Mouw. (Note: I work in a reformed church) In particular, the students love Mouw's Calvinism in the Las Vegas Airport.
Turns out I do too.
That's all for now!
-C.D. Clements