This website will give you the main topics that we focus on in language arts.  When you choose which one you need help with, it will then bring up a list of standards.  Choose which standard you would like to practice.  Once you choose the standard, you can choose which specific topic you would like to use.  When you click on that topic, information will pop up to help you understand the concept.  At the bottom of the information page, they usually have some practice materials to use.  Good luck!