Dan Finkel runs Math for Love with his wife, Katherine Cook. They have developed two games: Tiny Polka Dot: A math-enriched card deck for 3- to 8-year-olds. “It’s really flexible,” Finkel said. You ...

Anthony Bonato does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...