Because they don't want to just have the gifted to students alone, but they want all students proficient in integrity and. So that these children will grow up as citizens, the quality of the following countries.
Because they do not want to just students but only students, but they need both good and virtuous. So that these children will grow up to be citizens of the country.
Because they didn"t want to just the students with good alone but they want students both ability and morality. So that these children will grow up a citizen who has the quality of the country.