Microsoft supremo Bill Gates wants to fit school students with mood bracelets to measure how interested they are in their lessons.

The Bill and Melinda Gates foundation is spending $1.1 million (£700,000) testing galvanic skin response bracelets to see if they can measure whether students find their teachers engaging.

The move is part of the billionaire’s mission to evaluate and improve the quality of teachers, which has already included controversial initiatives such as fitting classrooms with video cameras.