QuizBean is a nice platform for creating simple image-based quizzes that your students can complete online. The service allows you to assign quizzes to students on a class-by-class or individual basis. Quiz results are automatically sent to your teacher dashboard when students have completed a quiz. The latest update to QuizBean allows you to bulk upload a list of students. If you prefer to have students do their own registrations on QuizBean you can now give them a "teacher code" assigned to you to enter to become a part of your class list.
Applications for Education
The option to include pictures makes QuizBean a good platform for asking questions that include diagrams and equations. One of the things that I like about QuizBean is that students get immediate feedback on each question that they answer. Before moving to the next question students are told if they answered the previous question correctly or incorrectly.