German Phrase
Wer ist dein Mathelehrer?
Meaning
The sentence asks for the identity of the person who teaches you mathematics. It is a straightforward, neutral‑tone question used in everyday school‑related conversation.
When to use
Use this phrase when you want to know who your (or someone else's) math teacher is – for example, during a school orientation, when swapping class schedules, or in casual chat with classmates.
✦Grammar Breakdown
WeristdeinMathelehrer?
Wer (interrogative pronoun)
Used to ask about a person’s identity; it does not change with case.
ist (sein, 3rd person singular)
The present tense of 'sein' (to be) used here to link the subject with the predicate.
dein (possessive pronoun)
Shows ownership; it agrees in gender, number, and case with the noun it modifies (here masculine nominative).
Mathelehrer (compound noun)
A compound of 'Mathe' (short for Mathematik) and 'Lehrer' (teacher); the whole word is masculine, nominative singular.
? (question mark)
Marks the sentence as a direct question.
🗨In Conversation
Wer ist dein Mathelehrer?
Who is your math teacher?
Mein Mathelehrer ist Herr Schmidt.
My math teacher is Mr. Schmidt.
✕Common Mistakes
Wer ist deine Mathelehrer?
The possessive must match the masculine noun 'Lehrer' in nominative case, so 'dein' is correct, not 'deine'.
Wer ist dein Mathe lehrer?
In German compound nouns are written together; separating them changes meaning and is considered a spelling error.
Wer bist dein Mathelehrer?
The verb 'sein' must agree with the subject 'Wer', not with 'du'. Use 'ist' not 'bist'.
↔Alternatives
Wer unterrichtet dich in Mathe?
Who teaches you math?
Wie heißt dein Mathelehrer?
What is your math teacher’s name?
Welcher Lehrer hat Mathe bei dir?
Which teacher has math for you?
Cultural Tip
In German schools teachers are usually addressed with their title and last name (e.g., Herr Schmidt, Frau Müller). When asking about a teacher, it’s polite to use the formal 'Sie' if you’re not on a first‑name basis, but among peers the informal 'du' and the phrase above are perfectly natural. Also note that 'Mathe' is the common short form for 'Mathematik' in everyday speech.