Do students measure well by current grading?

Grades have been being used as a scale since education began. Grade, and usage of it, is varying from a country to another, a culture to another. Some country may use grade by number like 100, 20, or 4; some use letter, or word. Whether the grade is a good incentive, which may encourage them for accelerating their study or not, is a controversial issue.

Although public beliefs that the way of current grading is more likely to be a fair, is one of the best few ways of grading, the cultural parameters have been playing a significant role in the tests and exams. It means that in the countries which accept immigrations initially the native individuals are more likely to be successful on the exams than the immigrants. Whereas, the statistic showed some of the immigrants are doing better than natives, it could be by the result of hard effort of them. On the other hand, in the same situation, same timing, and placing, perhaps the natives
would be more successful in the contemporary exams.

The reasons of this result can be find in ingredients of the tests, consequently cultural parameters are involve in many of the exams. For example, in toddler ages, children may be asked to shoot a ball, if they can it would be a positive mark if not it would be a negative mark. Also, eating by hand or using spoon or fork while they are eating the food. Both of these exams included cultural component. As exists, there are some cultures that people do not use fork or spoon, and also, by the result of environment they do not play with ball during the childhood. Therefore, it appeared as unfair test.

Therefore, grading is a good instrument to assess, no doubt. The problem is that: what the components of the test are. The authorities should be accurate and smart to choose the tests. Also, psychologist had better be involved in choosing the tests, in order to prevent any further bad influence on the children.
Finally, if the questions and the components of the tests choose wisely, it could be a good way to scale and encourage children or students.