Why don't high schools have classes on stock market?

When I went to high school there was no education on economy, let alone classes on how the stock market operates. Instead I learned the basics of economy when I went to college. I know teens don’t have much money to invest and it’s not even legal to invest at their age but teaching the importance of saving money and basics of compound interest would be beyond beneficial at their age.

Instead of nonsense classes like jrotc or French(which is completely useless for a teen), high schools across the world should be teaching the basics of economy. If there was economy or a market class back when I went to high school, I would of invested at an earlier age rather than waiting later in life

Super thought-provoking - would be cool to have this as an ice-breaker on one of the groups!