Teens don’t get enough sleep, and it’s not becau­se of Snap­chat, social lives or hor­mo­nes — it’s becau­se of public poli­cy, says Wen­dy Tro­xel. Dra­wing from her expe­ri­ence as a sleep rese­ar­cher, cli­ni­ci­an and mother of a teen­ager, Tro­xel dis­cus­ses how ear­ly school start times depri­ve ado­le­s­cents of sleep during the time of their lives when they need it most.

Das für mich bis­lang über­zeu­gends­te Plä­doy­er, war­um Schu­le frü­hes­tens um 8:30 Uhr begin­nen soll­te. (TED)