I strongly disagree. Math and other stuff such as reading or writing requires focus. That's what is degrading. Kids can't focus anymore, not by choice but because they're simply unable to do it (even for stuff they like).
Focus/Attention and patience are the skill that is degrading and proficiency in it is probably the pre-requisite for any successful growth in most other academic skills.
I'd be curious to see if those skills are being explicitly taught in preK and Kindergarten.
My kids play some gamified educational games and loved them.