Combine that with ensuring that your child's computer is in a public place, not their bedroom.
Not really practical advice in an era of tablets and mobiles.
Not really practical advice in an era of tablets and mobiles.
Most of the "harms" of screen time disappear when adjusted for things like socio-economic status: http://fivethirtyeight.com/features/screen-time-for-kids-is-...; http://daily.jstor.org/screentime-feminist-issue. Basically, like most parenting advice, exhortations to limit kids' access to screens is based on pseudo-science and old wives' tales. It should not be taken seriously.