Even though attending class and completing assignments is a top priority for most students, many find that they are not allowing enough time for their studies. On the average, students should spend about 2 hours of study for each hour of class time.For example, if you are carrying 12 credits in a semester, you should allow 24 hours per week for study (this includes time for reading, writing papers, preparing projects, and for test preparation).ven though attending class and completing assignments is a top priority for most students, many find that they are not allowing enough time for their studies. On the average, students should spend about 2 hours of study for each hour of class time.