Gynzy is a website for the teachers who use interactive whiteboard and it helps the teachers with easy-to-use interactive lessons and activities. Trying it out is free, here is the tutorial.
This is the easiest way to create, save and share lessons. You don't need to buy a software for your interactive whiteboard if you use Gynzy. Moreover Gynzy has continuous development and you can use every lesson in every class even everywhere.
Gynzy has lots of tutorial videos in Youtube. This is the video for the first-time users.