Yes! Don't relay on the reins, I use a rope halter to teach collection than switch to a liberty bridle or light rider once they get it down.
Actually teaching collection with a rope halter is one of the best ways. Because if your horse does not know lateral flexion, it's almost impossible to teach collection. Whereas if they know lateral flexion it pretty much comes naturally. To teach lateral flexion you're supposed to start with a rope halter. I'd YouTube it.