Just to add to that Bob, the way I teach is is to to tell the student to imagine we have parked the aircraft on a shelf at 3000 feet. we open the window lean through and observe 3000 feet on the altimeter, we than set 1013, now what is the altimeter reading without any aircraft climb or descent? From their pre-flight altimeter checks they should at this stage know, pressure up = altitude up and vicky versa. I find taking the CLIMB element out and parking the aircraft simplifies understanding
llanfairpg, that's a brilliant way of teaching it - thanks for sharing that with us!