There is a lot of fear about spins and some that do still teach them are a little to comfortable with them. I truly believe that imminent stalls and spin recovery without actually entering a stalled/spin condition is a bad idea. I have found that most primary students can't feel when the plane is about to stall and end up relying on speed to determine when to recover, and this is a real bad habit and they don't truly learn what it feels like. On the other hand I have seen many instructors that will make the student hold at least three turns because "it is not fully in the spin until three full turns." While this is correct the recovery is the same with one turn or 20 so why push your luck? Only teaching imminent stalls doesn't teach you how to recognize a stall and you may still not notice it until it is too late when distracted. Saying you need need to do three turns to fully appreciate a spin is a bit far fetched. If you can't figure out you are entering a spin by the first turn you have far more problems than that. It is the immediate break and start of rotation that is the critical part to learn to recognize and practicing that aspect, the actual break and start of rotation really drives home what that feels like so you can better recognize it and prevent it.