"The teacher is responsible."
Translation:Die Lehrerin ist verantwortlich.
Please always quote your entire answer when you have a question about why a given sentence was not accepted.
Very often, the problem is not in the word you think it is, but in word order, the wrong article used, the wrong adjective ending, etc. elsewhere in the sentence.
my answer was "Der Lehrer ist verantwortlich."
That should have been accepted.
it was rejected for the female translation.
Do you have a screenshot that you can share with us, to help me understand what might have gone wrong? (Upload it to a website somewhere and paste the URL into your comment.)
I'm sorry, I did not take a screenshot. To my knowledge what I said I entered was what was entered. HOWEVER, there may have been some other violation which triggered the response. I was mainly focused on the "die lehrerin" as the correct response. I did note that I had "der lehrer" and this prompted my submission. Normally there would be a "wrong word" or "typo" error, rather than "correct response". Duo has a tendency to repeat statements so I'm sure it will come up again. I will try my original answer and if it corrects me again I will take the screenshot and submit it. DL is really great so my bet is that it was something I did incorrectly.