Raz-Kids is an excellent website used for comprehensive levelled reading. There are many reading resources on this website, as well as ebooks that students can choose from. Students can listen to the book, read along or read by themselves. They can even take quizzes after reading each book in order to obtain stars, which can let them move up a reading level. This is an excellent tool used in my CSL classroom that proves to be very popular among the students. This website is especially useful for English Language Learners, and Critical Thinking Skills. It is mainly used for students from kindergarten to grade three.
This website allows for students to work at their own pace. Not every student learns the same way, and by using rad-kids in regards to reading, they can choose books that are comfortable for them, and decide their pace of learning; listening to someone else read the book while they follow along, or reading on their own.