[bambax]

I'm pretty sure the name is TNI although the board is indeed white.

I did discuss this with my children's teachers and challenge the whole concept, since like you I thought there should be a lot of value to justify replacing an ages-old technology that doesn't require power with a fragile one that can break and needs to be plugged in.

I was surprised to see the teachers themselves were very enthusiastic about it.

The one feature that really sold the technology to me was the fact that one can switch from the problem to the correction and back, which is impossible to do with chalk.

Also, teachers can prepare the lessons in advance. Basically, it helps productivity, it saves time. Another detail, the teacher faces the class when writing on the TNI, instead of turning her back to the pupils, which I remember was a great opportunity for children to be unruly.

(And TNIs didn't remove blackboards, they're in addition to them; if the TNI stops working or if the teacher prefers, blackboards are still there and still available.)