* If your teacher is female: You should use she.
* If your teacher is male: You should use he.
For example:
* "She is a great teacher." (If your teacher is female)
* "He always gives us interesting homework." (If your teacher is male)
It's important to use the correct pronoun to be respectful and polite. If you are unsure of your teacher's gender identity, you can always ask them directly or use a gender-neutral pronoun like "they."