It is about socialising kids, getting them to mix with different children, other socio-economic groups, other ethnicities. It is about them learning appropriate behaviour, making friends and receiving the guidance of an adult whose influence often goes beyond the curriculum.
Much research suggests that a positive, receptive teacher has more impact on educational outcomes than hours of swotting. No digital downlaod can replicate what a good teacher can offer.
And the sense of community and participation that a good school engenders is a priceless commodity in developing young people for the challenges of adult life.
Our children seem to spend enough of their lives with their eyes glued to various screens, headphones blocking out the world around them. They should get out more.
Nothing wrong with making use of technology - that is the world they are growing up in - but there's not much wrong with our schools, either, and it is at school that the technology should be put to use.