Science teacher.
What does the teacher want to talk to her students about?
Translates to English to mean what do you call the teacher?
* tu profesora de español means: your spanish teacher
"¿De dónde es la profesora?" in Spanish means "Where is the teacher from?"
To reply to "¿Quién es tu profesora de español?" in Spanish, you would respond with the name of your Spanish teacher. For example, you could say "Mi profesora de español se llama [name of your teacher]." This question is asking for the identity of your Spanish teacher.
Is your mathmetics professor a man or a woman.
De tu means: of your in English.
The indefinite article "de" in Spanish is analogous to the indefinite article "of" in English.
= She teaches dance class=Es profesora de clase de baile =
If it's a sentence fragment, it means, "...that the [female] science professor does during class. If it's an incorrectly punctuated question, it means, "What does the [female] science professor do during the class?"
To answer the question "De donde es la profesora de español?" in Spanish, you would respond with the country or city where the Spanish teacher is from. For example, you could say "La profesora de español es de México" (The Spanish teacher is from Mexico) or "La profesora de español es de Madrid" (The Spanish teacher is from Madrid). This question is asking about the origin or nationality of the Spanish teacher.
Of which or of what.