In 1999, while sitting at a bus stop in Cuernavaca, Mexico, a Czech physicist named Petr Šeba noticed young men handing slips of paper to the bus drivers in exchange for cash. It wasn’t organized ...

Research has shown that domain-general skills, such as patterning skills, working memory, and spatial reasoning, can predict children's mathematics performance (Peng & Kievit, 2020). The rationale ...