Plus if the parent has trouble reading - maybe because their education was lacking - they're less likely to read to their kids. It's a vicious spiral

I don't know why this simple fact is so often over looked. If you have to work two jobs, commute, play with your kid, do laundry, make dinner, clean up then try and relax there is NO TIME to nurture your damn kid. As a dad it's easy to see how single moms and blue collar parents have to constantly stick their kids in front of a iPad because they have nothing left to give.