Some people aren't that smart but they can be straight A's student. Some of the reasons: they have good teachers, they are hardworking, they want to achieve, they have helpful friends, they have good materials, they have a good environment to study, they have a healthy and clear mind, they have long attention span. They have good memory. They studied the correct subjects, they have passion for it, they are exam smart, they know how to manage their time, they are not careless.