With the proliferation of mobile phones, tablets and laptops, a new generation of cross-platform quizzing systems has come about. These are great tools that generate near instantaneous assessment data whilst at the same time being very motivational.
Each quizzing system has its strengths and weaknesses, and it is a really good idea to use a mix of tools. In our school, we use a wide range of tools, but the most popular by far is Kahoot getkahoot.com. There’s a very large selection of ready-made quizzes, which you can use or edit. The students have been using it for over a year and still find it very enjoyable. I would strongly recommend only using Kahoot as a plenary because, after the excitement of a Kahoot, students often do not want to settle down to do a task that requires thinking time.