Simple fix. Take away helmets or make them lighter like the old day and teach true form tackling instead of the “big hit” so every one can go “Whoaaa!”
The new fancy hi-tech helmets give an idea of invincibility and encourage leading with the head.
Truth be known most injuries are extremity (knee) related.
His answer? Take away the face mask and cut the pads. The kids will learn to stop leading with their head.