Freckle provides articles along with questions and writing prompts in the ELA section. The articles are provided in a variety of different grade levels. This site is free but requires a login.
5 Minute English has been designed to give you short and easy explanations and exercises in grammar, reading,vocabulary, listening, pronunciation, and slangs/idioms. Free and no sign in required.
Readworks is the largest, highest-quality library of nonfiction and literary articles. Readworks offers question sets, vocabulary, paired texts, StepReads, Article-A-Day™, ELL supports, audio, aligned to standards, and more. Free and sign in required.
Newsela offers high-interest texts that are organized by content area, engaging activities that encourage close reading, and student writing prompts. Free and sign in required.