Multiplication Games:
http://www.multiplication.com/interactive_games.htm
Maths Games:
http://www.maths-games.org/times-tables-games.html
Primary Homework Help:
http://primaryhomeworkhelp.co.uk/
Mathletics:
http://community.mathletics.com/signin/#/student
Top Marks:
https://www.topmarks.co.uk/
Hit the Button:
https://www.topmarks.co.uk/maths-games/hit-the-button
Bug Club:
https://www.activelearnprimary.co.uk/login?c=0
Easy Science:
http://easyscienceforkids.com/
Science Sparks:
http://www.science-sparks.com/
Bitesize:
https://www.bbc.com/education
Discovery Education:
http://www.discoveryeducation.co.uk/free-resources