Have you heard of Rewordify? This is a neat online tool that assists readers with vocabulary and thus reading comprehension. Here is how it works- the reader copies and pastes the text (web URL, words, or passages) they are struggling with into the text box and hits the button "rewordify". The system will "reword" the passage with alternative words for some of the original difficult words. The words that have been replaced will be highlighted and when the reader hovers the mouse over those words, the original word appears. This is a great tool for building vocabulary.
Some of our struggling students would greatly benefit from having this as a tool to help them with text they are having a hard time understanding.
See a screenshot below for a visual of what this tool looks like: