Listed below are a number of great websites which can be used to enhance your computing skills.
Popular package used by Lostock Hall for a variety of subjects and topics.
Especially good for maths and computing for all ages but other subjects at Secondary level. Note this uses the U.S. grade system but it's mostly common material.
This site is old and no longer updated and yet there's so much still available, from language learning to BBC Bitesize for revision. No TV licence required except for content on BBC iPlayer.
Learn computer programming skills - fun and free.
Creative computer programming