There is NOTHING that a student can not do (or try to do) and you NEVER get to the stage where you have "seen everything". In the past couple of months, I have seen a guy do pre-landing checks of BUM.... (and pull mixture to lean !). I have sat on the approach while a guy said 75-centreline, 75-centreline as the speed went to 70 and then 65. I could write a book about instructing ............ but I won't as I would hate to put anyone off a fine career ! Good luck nial.