What are good approaches to convince an elementary school age child to tuck his shirts/tshirts into his pants?
Every single time he gets dressed, the shirt/tshirt is over the pants.
He'll tuck it in when reminded with no fuss/objections, and keep it in during the entire day and won't attempt to take it out. So the problem seems to be with the tucking process and NOT with the fact of being inside or out for wearing.
When asked WHY he didn't tuck in, the answer is *shrug* "Don't know".