Read manga: Kodomo no Jikan

manga
Summary:

Daisuke is a 23 year-old new schoolteacher. He ends up being put in charge of a 3rd grade elementary school class since the previous teacher quit, and in that class there's a girl who's quite a troublemaker--Rin Kokonoe. You could call her a masegaki (used to describe a kid that acts more like an adult in some ways), and she's also part tsundere (though more dere than tsun).

Chapters (95)
Aug 28, 2011
000a
Aug 28, 2011
000b
Aug 28, 2011
001
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002
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020
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022
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Sep 26, 2011
076
Oct 28, 2011
077
Nov 26, 2011
078
Jan 22, 2012
079
Feb 22, 2012
080
Mar 22, 2012
081
Apr 23, 2012
082
May 23, 2012
083
Jun 24, 2012
084
Jul 23, 2012
085
Aug 24, 2012
086
Jan 11, 2013
087
Nov 25, 2012
088
Jan 08, 2013
089
Jan 25, 2013
090
Feb 25, 2013
091
Mar 30, 2013
092
Jun 29, 2013
093