Quizziz is a great formative assessment tool similar to Kahoot. The difference is the quizzes are self-paced and it has a read-aloud feature in the App! This makes it wonderful to use for struggling readers, ELL, etc. It also has a “Share to Google Classroom” feature built right in. There are tons of pre-made quizzes or you can quickly build your own. It is a free site and students join a game by a code (just like Kahoot). You can assign quizzes as homework also.