Sometimes things don’t go according to plan. Tools break, wires get crossed, the best-laid plans fall apart. And on those occasions, it helps to know exactly what happened—so it doesn’t happen again.

Imagine Jo: Everyone in Jo's life recognizes her as an outstanding problem solver. She's the type of person who seems capable of almost anything. Jo excels at intuitive problem-solving. Over her life, ...

Samuel Greiff receives funding from BMBF (Germany), European Union, FNR (Luxembourg), and OECD. He has been involved in the Programme for International Student Assessment (PISA) as an external advisor ...