The Superb Track indirectly measures the Confidence of Our Educational Standards.
The Carnegie Unit defines 120 clock hours (144 academic hours) to be the minimum time necessary to attain the knowledge and skills of a particular academic course. Therefore, if we are to expect a 95% confidence interval that the Carnegie Unit truly is the minimum time necessary to attain the knowledge and skills of an academic course, then a maximum of 5% of the students should be able to achieve the merit before 120 clock hours (144 academic hours).
Therefore, if more than 5% of the students are able to enter the Superb Track, then our Educational Standards are too low. Therefore, it is easier to place the accountability of academic standards to merit based exams made by third parties, since the exam developing industry is growing (by those that challenge the Carnegie Unit).
We can consolidate our education into two tracks (5 days per week, and 6 days per week). For either track, students may promote to the next grade only if they pass the merit based exam. The first attempt at the end of their second trimester, the second attempt at the end of their third trimester, and the third attempt at the end of their fourth trimester. Then, the distinction between the Superb, Advanced, Brilliant, Common, Dull, and Essential Tracks are blended together with intermediate levels.
Note that the percent of students passing the Superb level of performance indicates the quality of the standard. If more than 5% of the student body are able to pass then we will acknowledge that the standards are watered down. It would be easier to have external testing companies create those merit based exams then to internally develop them.