Grades Aren’t Always Indicators of Learning
People use their knowledge when doing a particular job; solving a polynomial to construct a jet, cutting a person in order to fight disease, or planting barley to enjoy tasty bread later, - all these are activities people do because they have got particular knowledge. However, in order to get acquainted with a separate person’s knowledge in a particular discipline, field, or industry, it would take hours, if not days, to test the person’s knowledge. In order to simplify this procedure, testers, who are in vast majority of cases employers, turn to grades in applicant’s diploma. However, there are many cases that confirm that grades are not always indicators of learning and knowledge. 
Imagine a student working till late evening before the final test. After this student arrives home he or she gets to the subject and reads the material the night before the test. In the morning the information would still be inside the student’s brain, but would it last longer? In many cases, not! Rather this information was stored in short-term memory and them released after successful usage. Or another less pleasant case is mere corruption, which is fortunately very rare. If a student fails a single course several times, and is about to graduate, he or she may bride the instructor in order to pass the course. In such case, on one hand both the student and the instructor will benefit, however most consequences would have negative impact on future of both. In the two examples described above, a graduate would have a good (or satisfactory) grade in diploma, but would know next to nothing in this particular field, which is the proof that grades do not always mean learning and knowledge.