Nintendo has announced software that allows Japanese schoolteachers to communicate with up to 50 DS handhelds using a PC.
It's called DS Classroom, and it sends pupils' multiple-choice answers from tests or surveys directly to the teacher's screen. Even basic writing and drawing activities are supported, according to Joystiq.
All DS types will work - even pink ones - but schools will need to provide their own hardware.
DS Classroom has only been announced for Japan, where the handheld has been used in schools for a while, albeit without the official help of Nintendo and dedicated software. No word on this for the West, obviously.