The latest serialisation of Sayonara Zetsubou Sensei (さよなら 絶望先生) in Weekly Shounen magazine has confirmed that the manga will be coming to an end after another 10 chapters.
The manga is created by Kouji Kumeta and it is a comedy about a suicidal teacher who perceives everything around him in the most negative light. The manga received the thirty-first Kodansha Manga Award in the shounen category in 2007. The manga series was serialised in Weekly Shounen magazine and currently 28 volumes of manga has been released.
Zetsubou Sensei is definitely one of my most favorite work and it would be sad to see it ending. Hopefully there would still be one more season of anime series produced in the near future.