When I took my first class, people were generally discouraged when learning Kana. It seems like they want something they can use immediately. Although I recommend that an individual learn Kana before starting a class, I wouldn't start the class itself that way. Your probably better off starting with coined phrases, and do them verbally. Yeah, you would probably hand out sheets in Romaji so they could memorize them at home. Then I would make sure they knew the Kana before going into learning particles and grammar. It seems far easier to see what is going on grammatically when it's not in Romaji.
That said, the brain seems to like a change of focus every hour or so. So, if your class is long enough, you might want to do 2 different elements a day so people don't start sleeping before the class is over.
Good luck.