formative is a new site for giving students quizzes/exercises and assessing them in real-time, that I just found out about from Free Technology 4 Teachers. The way this works is an educator creates a class on formative and students join w/ a unique code (i.e. ClassDojo). Once the student answers the quiz/questions, teachers get instant real-time results. This is a great way for educators to assess students and differentiate instruction.
I highly recommend checking out formative by clicking here!!!