<p>@vs1994, Because I’m a parent, I want my kid focus more on math not on games/facebooks, and I want my kid got enough sleep time too. I think those are concerns of other parents too.</p>
<p>@vs1994, Because I’m a parent, I want my kid focus more on math not on games/facebooks, and I want my kid got enough sleep time too. I think those are concerns of other parents too.</p>