In the Y4 Maths (link) area under the "Homework and supporting your child at home" section, there is already a great deal of useful information. In addition, the sites and links below provide a wealth of invaluable ideas and resources.
If you'd like to do a maths lesson every day, the White Rose link provides daily lessons (video and worksheets) exactly in line with our current learning. We did lessons 1 and 2 in class, so will be good revision, and the rest follow what we would have done.
Fantastic daily resources and lessons, including video lesson (similar to school lessons)
Twinkl - Resource packs for each group
Set up an account for free using the code UKTWINKLHELPS
Master the Curriculum - Free maths resources
Classroom Secrets - Sign up for free
Maths games suitable for everyone