my application concern with display lessons to users (as an image), displaying lesson based on user grade (as stored in Db). if grade=1, lesson1 will displayed /if grade=2, lesson1 will displayed and so on. when user login again I need to display advanced lesson to him, for example:if user grade=1, I need to display next lesson to him(lesson2). My question how do I know, that logged in is second time for that user? | 0 |