In youth basketball, especially at the younger years, the overwhelming number of points are scored within 5 feet of the basket. As a youth basketball coach, it makes sense to work with your team consistently on ways to finish near the basket. Work on footwork, on protecting the ball, on correct jumping form and going up strong.
I came across this video done with Ganon Baker leading instruction that might give you a few ideas on how to work on this. If everyone on your team could finish strong, think how difficult your team would be to defend.
Ganon Baker Video on Finishing at the Basket