Learning to use the rudder from the very beginning is the ONLY way to go. Teaching someone to fly without teaching them how to use the rudder is teaching them BAD HABITS that they will later have to break. Proper rudder control is the only way to correct torque induced yaw on takeoff. Rudder coordination is vital when making a PROPER, SAFE approach to landing in a crosswind.

There are a great many model aircraft that won't fly well without proper use of the rudder. Just about all bipes, for one, as well as most of the more popular scale models. Teaching someone to fly by forbidding them to use the rudder is a disservice and (IMHO, at least) bad teaching technique.