There are a number of useful websites that parents and carers can access at home to help with literacy and numeracy.
This website is aimed at adult learners but has hundreds of very useful exercises which are suitable for a younger audience. The site covers literacy and numeracy as well as ICT and other skills.
Maths is Fun
This American site has lots of resources to explain almost all aspects of Maths and Numeracy. The language is simple and is aimed at children.
Words for Life
Whilst aimed at parents and carers of primary age children – the Words for life website from the National Literacy Trust does contain some useful ideas for things to do as a family to help literacy.