Time needed: 10 – 30 min
Why? Modern latest technical devices are the future of the daily life, as sooner students get in contact with those instruments as easier, more comfortable and confident they will be in their usage.
When? Any time when a topic is introduced or completed.
How? Let students make topic connected photos with their mobile cameras and send it to their friends, the effect is that this friends will ask what those pictures are about, than the students will have to explain by themselves to their friends like a teacher. You can also form a competition which photo reflects as best the taught topic.
Any risks? There is no risk, it is a very enjoyable method for students and teachers to control and use absorbed knowledge.