I'm a big fan of Gokusen but I still did not watch the movie T^T
You can learn something from that drama. Characters, acting, storyline...are awesome, funny moments are there ofc...n_n
I want Yankumi as my sensei, think I'm not the only one XD

Please watch if you have time

Overall: It's way funny! Really great for a laugh! (I kinda wanted Yamaguchi and Sawada to end up together though)
Storyline: A young, idealistic teacher enters Shirokin Gakuen with hopes of making a difference in her students' lives. However, Yamaguchi Kumiko (played by Nakama Yukie) soon finds out that she will be the homeroom teacher of 3-D, the worst class in the school. The class leader, Sawada Shin (played by Matsumoto Jun!), is lazy but bright and shows some interest in Yamaguchi when he notices that she is different from the other teachers. The students try to bully her to make her quit, but their attempts don't get them very far. Yamaguchi Kumiko is actually the 4th generation heir to the Ooedo Group, a notorious yakuza clan adding twists and humour. The story is really funny (though a bit repetitive).
Music: Great. I still like listening to the theme song.
Characters: Sawada Shin and Uchi were my favorite characters! I fell in love with Matsumoto Jun and Oguri Shun because of this drama! (they're also in HYD together, if you didn't already know that).
Acting: Great and funny. Makama Yukie and all of the students were great actors.