the حاسب المعدل CEM app is an android application that helps the Algerian middle school students or their parents or teachers to calculate many types of averages like they calculate it in the Algerian middle schools, for example it helps to calculate the : - the trimester average -the BEM -the year average -a subject average - the class average all what it needs is to fill the empty gaps on the app and the app will calculate your average. the app features : -it has a small size - a si