2020-03-27T11:58:49ZFluxBBhttp://www.mathisfunforum.com/viewtopic.php?id=25563Do you have any idea that how many hours should be use smart phone for learning so that in order to regulate the use of smart phone?]]>http://www.mathisfunforum.com/profile.php?id=2201232020-03-27T11:58:49Zhttp://www.mathisfunforum.com/viewtopic.php?pid=412747#p412747