There are so many great websites that can be used for math fact practice. In my 3rd grade intervention group, Friday is our chromebook day. The students can go to the math sites I have listed or they can share one of theirs with me. To use the site, they must be practicing a math skill.
My favorite website for math practice lately has been Johnnie's Math Page Johnnie has put together a great page of MANY different math sites.
The students often have some great sites to share. One site they have shared is ABCya for Math. You can choose a grade and then scroll down to the math part and play away!