Mathletics - https://www.mathletics.com/uk/ - All pupils from Year 1-6 have logins for Mathletics. Once the work set by the teachers has been completed the pupils have access to all the activities as well as the online challenges.
Readiwriter - This has the same login details as Mathletics and can be accessed from within Mathletics as well as directly from: https://login.readiwriter.com/
This website offers some great games and activities to practise the spellings set by the teachers.
TimesTable Rockstars - https://ttrockstars.com/home - All pupils from Year 1-6 have logins to access TimesTable Rockstars. It is a fun way to practise timetables at home.
BBC Bitesize is a great resource online with games and activities across the curriculum.