ReadWorks provides a wide variety of non-fiction texts for grade K-12 with questions and vocabulary to go along with each text.
ReadWriteThink is a resource developed by the National Council of Teachers of English that provides many lesson plans and resources to support reading and writing.
CommonLIT provides a large amount of fiction and nonfiction texts for grades 3-12. Each text includes SBA type questions and writing prompts. There is CommonLit 360 curriculum with full units of study for grades 6-12.
LitPick is a resource for Young Adult literature. Students can read reviews from other students, write their own reviews, and participate in games to increase reading volume.