Here are some websites that allow students to work on grade specific outcomes in Math and Science. Click on "here", and it will take you to the website. You may have to subscribe or create a membership account; however, it will benefit students significantly. I really recommend IXL, it covers all the outcomes for Math and ELA. It is a bit pricey, but worth the money. Most of these websites have free trials.
IXL - here
Explore Learning - here
Math Learning Center - here
Mystery Science - here
Teachers Pay Teachers - here
Education.com - here
Math-Whizz - here
Xtra Math - here
IXL - here
Explore Learning - here
Math Learning Center - here
Mystery Science - here
Teachers Pay Teachers - here
Education.com - here
Math-Whizz - here
Xtra Math - here