Several online technology companies are making their services available at no cost for the remainder of the school year. My favorite among them is probably Newsela. The details of the new offer is explained in the front page when connecting to the site.
If you are unfamiliar with Newsela, it is a service providing multiple reading levels of the same news stories. The stories come with comprehension questions and instructional suggestions. Here is a more comprehensive description I wrote a couple of years ago.