I recently stumbled upon what looks to be a jewel of site called Commonlit. It boasts that it is made by teachers for teachers. "COMMONLIT is a collection of poems, short stories, news articles, historical documents, and literature for classrooms."
In three simple steps, you can find thematic texts connected to an essential discussion question. Texts are sorted by grade level bands for 5th-12th grade, and also include the Lexile measure.
STEP 1: Choose a theme
There are several to select from, such as resilience, power & greed, and love.
STEP 2: Choose what they call a discussion question from within that theme. Most of themes I clicked on had two discussion questions.
STEP 3: Download the PDF versions of texts you are interested in using. The text selections I clicked on included text-based questions, discussion questions, and most had a text pairing guide for teachers. We all know that we have a range of readers in class, so I suggest looking through all the grade level options to see what will work best for your students.
It's online and free. Awesome. You don't even have to register for an account. Even more awesome. However, you can subscribe to get email updates. I hope you find some good stuff on there. Let me know how you use it! (Below is a screenshot of the homepage. The link is below the pic.)