Which manga is this....?

Question

About a teacher who has a split personality. One wears a mask and tutors kids by beating them up. The other is just there. The boys at the school are ruff and tuff. Oh the teacher with the mask shaves the boys hair when he beats them.

Answer 1

The manga is Kamen Teacher by Fujisawa Tohru.  

http://www.mangaupdates.com/series.html?...

*Note - I'm not sure about the "split personality part," as the scanlations haven't progressed that far.  

Answer 2

Try Cromartie high school. If not, then possibly Gokusen.

Answer 3

i dunno, but go with the link below and click show option check the genures that you think the manga your looking  and click search then check all the mangas that appear below the search box

http://www.mangafox.com/page/manga/index...