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

Oak Academy: https://classroom.thenational.academy/subjects-by-key-stage/key-stage-2/subjects/english

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

Science

Working Scientifically - https://www.bbc.co.uk/bitesize/topics/zqkk7ty

History

Roman Empire - https://www.bbc.co.uk/bitesize/topics/zwmpfg8

Roman Britain - https://www.bbc.co.uk/bitesize/topics/zqtf34j

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