Here are some useful links that you can use if you're not in school or would like to do some extra work.  The links to videos / activities are listed below: 

Maths

TTRS: https://ttrockstars.com/

White Rose: Year 4 (New Scheme) https://whiterosemaths.com/homelearning?year=year-4-new&term=autumn

Maths Frame: https://mathsframe.co.uk/en/resources/category/22/most-popular

Percy Parker Times tables songs: https://www.youtube.com/channel/UC_zy534iRaPxlFdniQZr8Kg

Literacy

Online LCWC: https://www.ictgames.com/mobilePage/lcwc/index.html

Lighthouse - https://www.literacyshed.com/the-lighthouse.html

Science

States of Matter - https://www.bbc.co.uk/bitesize/topics/zgwc96f

Geography

Rivers - https://www.bbc.co.uk/bitesize/articles/z7w8pg8

Rivers - https://www.bbc.co.uk/bitesize/articles/zx4j2v4

Computing

Scratch online: https://scratch.mit.edu/projects/editor/?tutorial=getStarted

BBC Dance Mat Typing: https://www.bbc.co.uk/bitesize/topics/zf2f9j6/articles/z3c6tfr