The instructor will make sure that he build positive rapport with all his/her students. He/she will make sure that the names are learnt, something about their background, as well as their ages if possible. The ages can be learned through genuinely sharing through the breaking ice moment on the first day of class. What I usually do on the first day is to have an ICE BREAKER activity: I would have the student give their names, age and what town they are from and one FUN FACT about themselves. Through this activity I get some interaction going on; and this usually takes may be 30 minutes or so.