Maths Antics: We think that these short, yet detailed videos by Math Antics are truly valid and clear. There are different videos for different mathematics concepts. The one you access through the link is about place value… but there are loads of them.
MATHPLAYGROUND: If you feel like engaging in some mathematics online tasks, you will surely find a task you like on this site. We tried some of the tasks ourselves. Quite fun and challenging. Enjoy.
TOP MARKS: Another one of our favourites is https://www.topmarks.co.uk/ . Some of the games are even tablet-friendly. We are all for different opportunities for learning and this site offers ample opportunities for learning in a fun and interactive manner.