I studied in Czech Republic and we had entire class spanning out over two years for economic and financial literacy at my high school. On the practical level, we were even tasked to fill out tax returns for a fictional company and we learned how to start freelancing & start a company. It was a high school in a rather small town on the south of Czech Republic, nothing special. I don't know how common this is in the rest of the country, but I remember that I and some of my classmates were leaving high school with income from freelancing already. There are very few people I know that didn't have a source of income when they finished high school.