Websites for extra practice and reinforcement:

 

 

IXL

https://www.ixl.com/

You do have to pay for a subscriptopn, but it is one of the best resources.

 

Woot Math

https://www.wootmath.com/

 

Khan Academy

https://www.khanacademy.org/

This is a great place to go for step-by-step videos and practice problems. 

  

Common Core Worksheets

 http://www.commoncoresheets.com/ 

From this site, you can print practice for any math skill at any level and

the answer keys are included.