Joy large Number Recognition-QDLearn app for iPhone and iPad

The game is mainly for primary school grade four，corresponding the fourth grade first unit of
primary school mathematics of Human education-- Large number cognition.Games of QD learn are developed specifically for primary school education ,both educative and entertaining.Game design is supported by educational theory.One game one knowledge point.Multi angle interpretation.Repeated practice of different forms of investigation.Play and learn focus.Master difficulty in interest.Proficiency test.
QD learn aims at teaching through lively activities and happy learning.