There is no set amount of time that students should study at home. The amount of time needed will vary depending on the individual student's needs and learning style. However, a good rule of thumb is to study at home for at least 2-3 hours each day. This time should be used to review lectures and readings, practice problems, and complete assignments.
In addition to studying, students should also make sure to get a good night's sleep and eat a healthy diet. These factors can all contribute to a student's ability to learn and retain information.