...or should I say "yesterday mathematics teacher"?


Usage in a full sentence:

'I'm waiting for yesterday's Mathematics' teacher to come online'

  • 1
    Can you provide its usage in a full sentence? Apr 14 '16 at 13:16

American here, so your usage might vary by country. I think it will be dependent on your intention.

Yesterday, the mathematics teacher taught algebra.
Yesterday's mathematics teacher taught algebra.

I think both are fine but mean different things. The first one means that the normal math teacher taught algebra yesterday. The second infers that there was a different teacher (substitute teacher possibly) yesterday that taught algebra.

In your example, I think this would be what you want to do:

I'm waiting for yesterday's mathematics teacher to come online.
  • Ok, so I can't really say "Mathematics' teacher" or for instanace "Philosophy's teacher"?
    – Cris Benois
    Apr 14 '16 at 13:21
  • 1
    I don't think so. The apostrophe shows possession and math doesn't own the person. Also, I rarely hear mathematics; in conversation, math is far more common. Apr 14 '16 at 13:21
  • Ok, interesting. Is there a difference between the two?
    – Cris Benois
    Apr 14 '16 at 13:23
  • Updated answer. Apr 14 '16 at 13:25

The teacher who taught mathematics yesterday is "yesterday's mathematics teacher". The teacher who (now) teaches philosophy is the (current) philosophy teacher.

While a teacher may personify his discipline and say that he belongs to it, it would be unconventional. ;)

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