问答题 From the abacus to the Apple Mac, technology has constantly changed the way we learn.
In equal measure, the needs of education have provided the driving force behind some of our most significant technological innovations.
Most classrooms in the world would insist on having students turn their mobiles off-- but one scheme in Bangladesh is very much about keeping them on.
The Janala service--created by the BBC's development charity the World Service Trust--gives anyone with a mobile the chance to learn English-- simply by calling a number and listening in.
Mobile telecommunication is the fastest growing industry in Bangladesh, and the service has already logged over 400 000 calls.
"We can't carry a dictionary everywhere," said one Bangladeshi student.
"But now we can carry a mobile phone which helps us learn./