Sumdog -Learning maths through playing games. https://www.sumdog.com
Prototec -Basic facts practice https://maths.prototec.co.nz/
Maths Starters - Very good warm-up activity https://mathsstarters.net
Prodigy Maths- Game based maths - runs kids through a diagnostic test and then assigns them to a grade. Questions from all major maths areas. Teacher reports available to check strengths and weaknesses. Kids love it https://www.prodigygame.com/
Hit the button - Number Knowledge https://www.topmarks.co.uk/maths-games/hit-the-button
Money- Learn about handling money and it's value-www.titlemax.com/articles/titlemax-money-games/ (this link was suggested by Pierce who works with Desiree Rhodes from Laser Beams and Robots STEAM Club.)