Using mobile phones in the classroom

You need your book and a pencil, your mobile phone is best kept switched off in your pocket... Or is it?

Do your teenagers play with their mobile phones in class...? Do your adults suddenly stand up in class and walk out, as whoever it is that's calling them is much more important than their English class...? As a teacher, do you hate mobile phones too...?

This article on Modern Foreign Language Environment [website] suggests ways in which you could make (profitable) use of mobile phones in the classroom...