One of the first educational games I ever played was a simple little title called Lemonade Stand. The idea was you had to earn money by investing in lemons and sugar to make lemonade which you would then sell at a profit. Of course finding the pricing sweet spot per glass, as well as factors such as tomorrow's weather report, had to be taken into consideration in order to run a successful business. Early versions didn't have an ending, but later revisions allowed the player to declare victory once they had accumulated $100 in savings. That might not sound like a lot of cash, but keep in mind this game was meant for children growing up in the 1980s. So, while becoming a lemonade tycoon might not sound like much to brag about, remember that the real point of this game was to learn what it's like to be a businessman (or woman) and see things through their eyes.
link), or alternatively simply try it out for yourself. The free beta/demo version is available for download here. It's also interesting to note that the game's creator, Lucas Pope, previously made The Republica Times, another soviet era game wherein you manage the government's one and only sanctioned newspaper.