China's "Age of Exploration" ended as a result of the death of Emperor Yongle’s death in 1424 AD
Many trade items dealed with exporting
I believe the answer is: <span>making school boards non-partisan
Partisan school board would most likely make the materials in the curriculum to be leaning toward a certain political affiliation.
For example, if the school boards is controlled by members with Republican-leaning, the material of economic subject would be focused on the benefit of low taxation for the economy.</span>
By completing with other nations and expanding boundaries