Here are a few resources that may assist the students:
1. Rewordify: This is a site that helps to improve reading and simplify difficult words that may be hard for students to understand. To use you just copy the text you are trying to read and paste it into the box on the page and it does all the work simplifying the langauge.
2. Natural Readers: This site provdes unlimited access of the "free voices" and allows to upload files or copy and paste text that will covert written text into spoken words.
3. Khan Academy: This site offers many online videos and supplemental material that can be used to better understand material that is taught in many different classes. Just search the topic you want.