Chain bridge in China. 1930s.
It’s important to mention that in just about all of the following ancient societies, formal education was typically the privilege of wealthy families.
Most children received no instruction outside of the home, if there was any time for education given the hours spent performing menial labor. Not to mention all the children in these ancient societies that were born or taken into slavery. Also, if you were born a girl, you pretty much had no hope of formal schooling, wealthy family.