Honestly, I don’t know how to operate a computer. I’m a WhatsApp exam-refiner,” said Maxwell Chimedza. The 27-year-old preps students who are on the threshold of sitting for Zimbabwe’s ultra-competitive high school exams, the A-Levels. The tool of his trade? A Samsung Galaxy A10S cellphone with a modest 32GB of storage. In 2021, Chimedza captured attention locally after his class of 64 WhatsApp students between them snagged 41 A-grade marks., ostensibly placing them in the same league with students from Zimbabwe’s expensive elite boarding schools. Up to 50,000 students across the...