These are very similar to the mini whiteboards and are sometimes called static or sticky whiteboards as they stick to flat surfaces such as walls without using blu tac or tape.
The A3 size ones are great for round robin activities or small group brainstorms so that the students are able to show their work without you being stuck with big sheets of sugar or flip chart paper (so they are environmentally friendly as well.)
I have used the A4 instead of the of “Show Me” boards because a box of them is far too heavy to be carting around all the classrooms I teach in!!! These work well as the students just stick them on the desk until you want them to show you what they have done. I have also given these to students who find it difficult to sit still so that they can doodle on them rather then their books!
The whiteboards can be purchased from most stationary suppliers and come on a roll so you just tear off the number you need when you need them. As the are static they are good for using in displays on or demonstrating student work in your room without having lots of big pieces of work to store.
The Hectic Teacher's Ideas Bank 