There are lots of Home Learning Resources available, and so I have included a few more links here. Some are printable and so can be printed and used at a non-tech time.
I would also like to add that if any children are finding the year 4 resources too testing, which they may do outside of a classroom environment, then these links also include access to the work of other year groups that may provide a more comfortable level of challenge.
I will keep updating the resources on this page as often as possible.
White Rose Maths Hub (They have a Year 4 home learning pack that includes demonstration videos as well as worksheets.)
Don't forget for a bit of computing there is always https://code.org/learn