Kubbu is a site that allows a teacher to create interactive quizzes, games and other activities. What’s nice about Kubbu is that you can enter up to 30 students into your free teacher Kubbu account without having to enter their personal information. Students can then login and use the activities you created. There are some limitations to the free account: 15 activities at a time, student results stored for 30 days, the account is deleted after 60 days of inactivity. Of course you can purchase a Pro or Ultimate account to avoid these limitations, but I think the free account offers enough options to make it valuable to the classroom teacher. Try out some of the activities from the ‘Samples’ or ‘Shared Activities’ menu to get an idea of the kinds of things you can create.