I think it's because you do learn general thinking skills at school and you are able to practice them, and you have lots of opportunity to practice them.

我认为那是因为你在学校学习一般的思维技能，你能够实践它们，你有很多机会实践。

youdao

I had the opportunity to test my skills and knowledge in high school, when I competed in several national math competitions, including the Korea Mathematical Olympiad.

高中时参加的几次国家级的数学竞赛，包括韩国奥林匹克数学竞赛，让我得到测试自己数学能力和知识的机会。

youdao

Girls in school have an opportunity to escape early marriage and early motherhood, and to gain skills that give them enhanced economic and social opportunities.

CNN: Make schools safe for girls everywhere