And not only the runup
We don't seem to be able to teach our students any feel for the aeroplane.
For instance, being able to recognise when they are on the back of the drag curve. I've found a useful exersize is to get the student to find the speed at which they can maintain height with the least possible power setting, then progressively slow down while maintaining height until they are at full power. Then accelerate back to their original speed. It needs a calm day.
On the ground school side, how many students can quickly find information in the poh? We are all giving our students an electronic copy (scanned, on a USB key) to take home and study, I hope. I do this with a few other useful items, .
Plogs, met decodes, club statutes, local flying rules etc. Most people seem to have a flash card or USB key to hand, so it costs me nothing.