You can practise your sums, write your answers, share your answers and practically bring the classroom whiteboard to your table, without any expensive IT gadget. It is like a palmtop without the price. It is like sharing a piece of your mind, enlarge, and erasable. It is your interactive whiteboard without having to recharge.
Every class should have this to make thinking visible, to make thought into tangibles. Can we get the D&T dept to create one as their lower sec project?