The teacher taught math to her students.
Meaning: This sentence describes a person who is providing knowledge or skills to people who are enrolled in a school or college about the study of numbers, quantities, and shapes.
Choice of Words: Taught is a verb that means to provide knowledge or skills to someone. Math is a noun that refers to the study of numbers, quantities, and shapes. Students is a noun that refers to people who are enrolled in a school or college.
Alternative Expressions
Related Expressions