Gokusen

Kumiko (known by her students as "Yankumi") grandson of the famous Yakuza in Japan becomes a teacher at an all-boys private high school. Her class is full of delinquents, but she tries her hardest to teach them not just about academics (her subject is Mathematics), but about lessons of life, much like any "dedicated teacher" story. Though she's forced to keep her family a secret from the public, her Yakuza upbringing gives her the strength and the experience to reach out to her students, while also providing comedic relief.The story is suitable for all person actually teacher,student and all kind person.