I have recently discovered Kahoot! which is a free quiz game that anyone can use to make interactive quizzes. Competitors compete for points using their mobile phones or tablets to enter their answers. The quicker they choose the correct answer the more points they earn. It is very competitive and certainly provides plenty of pace to a lesson. It is completely free for both teachers and students to use. To start, set up an account at http://www.getkahoot.com and begin making quizzes.
Here is my first attempt. (I edited an existing one by improving the questions to include misconceptions and added a video for the start).
Mean, Median, Mode and Range
Here are some other Maths Kahoots! Please let me know your favourites and I will add them to this list.
Multiplication Facts 9 times table
Mental Math addition
Rounding Whole Numbers
What others think
Great maths teaching ideas
Quizizz-an alternative to Kahoot!
The Math Hatter