Translation:This "Modern Kindergarten Teacher" is a very boring newspaper!
This is something that should be reported. Next time you go through this lesson, click the Report button after you get the error message. They should definitely fix this, but the team members probably won't know about it if you just post it here because they don't read these boards consistently.
"Paper" rejected in favour of "newspaper". This specialist paper about these wretched kindergarten teachers wouldn't be a newspaper in the conventional sense. "Paper" is often used as the short form of "newspaper" anyway. How are we supposed to second-guess Duolingo's mind? More unnecessary and infuriating nit-picking. I hate those big, red accusing letters!
The contributors can't have every synonym in mind when creating the exercises. That's the purpose of the beta phase where volunteers as yourself can report these missing translations, so keep reporting diligently. :)
(though I admit it always seems to take a painfully long time for a new solution to be added)