In 2019, they took a chance and went on Höhle der Löwen (the German version of “Shark Tank”; literally, “Lion’s Den”), a show on the TV station VOX in which young entrepreneurs present their startup ideas to investors. Zacharias and Kroll didn’t find anyone there who wanted to invest in their startup, “but the marketing effect was amazing,” says Zacharias. The episode aired in 2020, the year the Covid-19 pandemic had a firm grip on Germany and schools were looking for ways to keep classes up and running.
