Don't teach History, then Philosophy
I don't know about other systems, but in Spain, you learn the world's history until you've reached the current date (when you're 16yo). Then, the next year, you start studying philosophy.
This may sound good to you. Some people may argue that "kids" can't understand great philosophers because they are not mature enough.
But, why are we learning History? The end goal isn't memorizing dates or knowing all the details about some random historical event.
“We learn from history that we do not learn from history.” - Hegel
History repeats itself (Napoleon and Hitler both failed to conquer Russia for the same reason), and we learn it to avoid falling into the same mistakes other made in the past.
From this perspective, doesn't it make sense to learn what motivated our history, instead of specific dates? How can we truly understand the French Revolution if we don't know about what motivated it?
And sure, those 15-year-old "kids" may not be mature enough to understand Anaximander's approach to metaphysics (the Apeiron). I'm not asking for early philosophy classes. What I'm asking for is to provide some context on the thoughts of the people who changed the curse of History, so that we don't misstep where they did.