This is another website that I think will be beneficial. We use this in class and they will also be able to use it at home as well. It is called Khan Academy. This site deals with Math content that starts at the beginning of third grade that lasts through the end of the year.
If the link doesn't work, please copy and paste this into your browser. https://www.khanacademy.org/coach/dashboard
This is test preparation for the PARCC. This has a section that is divided up into both Math and Reading.
If the link doesn't work please copy and paste. https://parcc.pearson.com/practice-tests/
I also would like to let you know about a reading program that we are using in school this year. I am very impressed with this program. It has taken the place of Achieve3000. The name of it is Lexia Core 5.
You can get to it by pressing the app button on your student(s) I-pad and then logging in using their log in and password information.