There are far better things to give your students than "piano pop", in terms of speaking about pieces that are easy and fun. Just about everything that Nyman has written, with the exception of his piano concerto (a bit of a guilty pleasure for me), is fit for the dust bin, if you ask me. If you want something easy, fun, and "academic", look at György Kurtág's Játekók. He has written many books of these very small and fun pieces. Just because Nyman's music has commercial appeal doesn't mean it is good. It is like saying that just because Britney Spears has commercial appeal means that it is good (well, they are both pop music, really). There are some concert music works you can play in a casual setting. Bach, I would say, can be good for that in his smaller works. And surely there are tons and tons of miniatures written by composers over the years that could work, in addition to Kurtág's pieces.