学校 (xuéxiào)
refers to a school or educational institution where teaching and learning take place. 学 (xué)
means "to study" or "to learn." It refers to the act of acquiring
knowledge or skills through education or self-directed learning. 学 (xué)
can also mean "school, college", however, when it's used in this meaning, it's never used alone. Instead, it's used to form other nouns, for example -
中学 (middle school
)
,
大学 (university).