Hi all, I need develop an Education Application which allows Student answers some questions within a limited time. For example, in level 1 Student need to answer 10 questions within 2 minutes ... I need to display the time remaining on the view too... I am not sure how to do this... Is it using NSTimer? And is it fire an event / method to change the time remaining displayed on the view every second by using scheduledTimerWithTimeInterval? Anyway, I would like to hear some ideas and opinions from you all. Hope someone can share their opinions with me. Thanks a lot. Any ideas and suggestions are welcome.