Learn Portuguese (Portugal): Muito prazer, professora!

Instead of saying 'pleased to meet you', Portuguese speakers simply say muito prazer, which literally translates to 'much pleasure'. This is the standard, everyday phrase used when being introduced to someone new.

Does the phrase muito prazer change depending on if a man or a woman is speaking?

No, it always stays exactly the same. Even though muito can sometimes change to match feminine words, the noun prazer is always masculine. Because the describing word matches prazer and not the speaker, anyone can say muito prazer.

How would I say this to a male teacher?

You only need to change the noun for the person you are talking to. A male teacher is a professor, so you would simply say Muito prazer, professor!

Why isn't there a word like a before professora?

In Portuguese, you usually put a word for 'the' before a person's title when talking about them. However, because you are speaking directly to the teacher in this sentence, you drop that extra word.