In this sense, effective teaching of solar energy demands to avoid teaching abstract theory and principles, but rather needs to be continuously reconnected to real people's life, from the first life-saving solar pumps used by Father Ver- spieren in Mali in the late 1970s during the country's worst drought of the twentieth century, through the negative solar energy prices recorded in Germany as of Spring 2015 due to the record 27 GW of solar power connected to the grid.