Here are some web links that might be useful for children and parents to use at home to practise their mathematics.
https://www.topmarks.co.uk/maths-games/5-7-years
https://www.topmarks.co.uk/maths-games/7-11-years
*Hit the button on Topmarks is particularly good for times tables practise.
https://www.mathplayground.com/
http://www.bbc.co.uk/schools/websites/4_11/site/numeracy.shtml
http://www.primaryhomeworkhelp.co.uk/maths/
http://www.math-exercises-for-kids.com/competition/math-world-cup.php