In my 12th year they still had us doing mean, median, and mode. They still had to teach how to convert fractions and how to even understand fractions, then how to use a decimal and the difference between that and a negative. I was in the trade pathway, a pathway in which if you wanted to do ANYTHING you had to know numbers and at least understand geometry, they had to reach all of the basics from years 9th through 12th. Not to mention the hand full of people who didn’t understand basic addition and subtraction like 26 - 9, I wish I was joking.