One of the best websites to use is Pie Corbett Maths. There is a video for every single aspect of maths that we cover which shows exactly how we do things in school. There are also follow up questions for the children to complete to embed their understanding as well as 5 a day practice and revision cards.
BBC Bitesize has many interactive games and explanations for key areas of maths that the children enjoy:
You can order books to use at home through CGP: