The children have different maths groups which means they would be at varying points in the curriculum which makes it a little harder for me to guide them remotely.
I would heavily recommend mathletics, timestables rockstars and mymaths because these programs will give the children instant feedback as to whether they are getting things right or not.
I have added a link from White Rose Maths below. This is an excellent resource that we follow in school. I recommend using this to help guide the children through new topics as well as revise old ones.
I would recommend the children taking this time to learn all times tables off by heart as they will be sitting the new government assessment test on this in Year 4. Having an excellent grasp of the four formal methods will also be crucial as they move on through the school (find powerpoints on these below.)
Online Maths Games