Difference between IQ levels of 150 and 155 will be similar to differences between IQ levels of 95 and 100
Grades are levels, and years are time. Some students skip grades based on their results, while others are held back to repeat grades.
There were fewer students in the higher grade levels due to a combination of factors, such as increased dropout rates, challenges in academic performance, and changing demographics. Additionally, some students may have opted for alternative education pathways, like vocational training or online schooling, which can lead to reduced enrollment in traditional high school programs. Economic factors and family circumstances may also contribute to students leaving school before reaching higher grades.
An ungraded school is a school that does not formally classify the students by the traditional grade levels. Instead, teachers evaluate each individual student.
20 Volume (or 6%) developer will lift hair 2 levels and 40 Volume (or 12%) will lift hair 4 levels.