I have done this with Renaissance pieces. You will find some good lyrics about love and you don’t have to sing the entire song just go to a cadence point. They may be difficult but there are some in 2 parts that could work for you. You need to sing something that can be performed a cappella in order to move around. The issue I had with this was it interrupted other classes and I eventually had to stop as the other teachers didn’t appreciate it. It can be accomplished during lunch hours.
NAfME, Choral Education Council Chair