McLoughlin Brothers introduced the successful "Grandmama's" series of educational card games in 1887. Players assumed the roles of "scholars" and designated one participant as the "preceptor." Scholars tested their knowledge answering question posed on cards, and the preceptor confirmed or corrected them from a companion book of answers. Grandmama's game subjects included geography, arithmetic, useful knowledge, Bible studies, and riddles. Games such as this endure to the present day; a great contemporary example is the Trivial Pursuit game type.