Thanks for all the suggestions. I'll have to put some of them to work.

I forgot to mention that most of these classes are one-on-one. I only have one class with two students. The students are mostly adult women though lately I have had a couple of young teenage girls to teach. Most of my students are Japanese with a few Chinese and one Indonesian woman.

The classes are fun. The women are housewives. I think they are bored and want to improve themselves. One of my Chinese students was manager in a company in Taiwan but now is "only" a housewife. I think she is frustrated at the hand she's been dealt.