Schools have put in place learning resources to enable home study, where children are not able to attend school. Government advice has been published to assist parents schooling children at home; see the school closures, education and childcare tab here:
The London Grid for Learning advice for Schools and Local Councils appears to be the most comprehensive and authoritative site with educational materials for those of school age, including advice for parents: https://coronavirus.lgfl.net/
In addition, this information should assist:
The Open University Statement and link to OpenLearn (free courses): www.open.ac.uk/about/main/covid-19 .