Is CommonLit really free? Is there a freemium or premium version?

CommonLit Digital, including CommonLit 360 Curriculum, is 100% free for teachers and students, forever. As a nonprofit, our goal is to pay so teachers don't have to. Read more about why and how we're free here: https://blog.commonlit.org/why-commonlit-will-always-be-free-for-teachers-and-students-8daa38f48b03