Grades Points Average is a standardized measure used to evaluate a student’s achievement over the academic year. GPA can be subjects to changes; in fact, it can decrease or increase. These changes can be due to some factors such as the time spent studying or doing homework, the time spent sleeping, drinking caffeine or doing outsides activities. We hypothesized that there will a strong positive correlation between the time using for homework or study and GPA, the correlation between sleeping habits will be weak positive, the correlation between the extracurricular activities will be medium positive. It was found that more sleep was associated with higher cognitive function and less sleep was associated with less cognitive ability (Sivertsen
