Nope, you can't. But it is invaluable when you are in the flare in most a/c. As with anything, you teach the best method for the machine you are training in. For instance I wouldn't use C150 techniques in a 737 or vice versa.
I have never had a student who hasn't been able to land when following that advice. Since we use our peripheral vision to judge our rate of descent to the ground, looking at the cowling is a pretty daft idea!