This book provides actual examples of challenging implementations of Math Problem Posing in school, teaching education settings, and home environments. Firstly, it explains how a teacher educator introduced Math Problem Posing to students using concrete tasks and assessment methods. Secondly, it discusses how a teacher educator worked with school teachers to use tasks, assessed students and to develop more tasks. Thirdly, it describes cases on how a teacher educator and parents used Math Problem Posing at home and in out of school settings. This is a book dedicated to researchers, teachers, students, and parents and also all those who are interested in the use of posing problems for active learning and teaching.