As a third lockdown traps millions of British schoolchildren at home, free tablets and televised lessons are being touted as alternative ways to learn in a lockdown.

A new brain decoding method called mind captioning can generate accurate text descriptions of what a person is seeing or recalling—without relying on the brain's language system.

In rural Sierra Leone, teenagers tuned into solar-powered radios for their lessons, while Kenyan students texted a code to ...