If you're looking for manga similar to Ultimate Teacher, you might like these titles.
The everyday life of a very short (141cm) yet large breasted school teacher, Watashiro Riko, whom her class has nicknamed Loli-sensei.
Yui-chan-sensei is a charming high school teacher—so charming that her students are always coming to her for advice on sex! But it seems that she has a secret...? Follow Yui-chan-sensei's and her students' school lives while learning about sex in this very lewd, yet very educational comedy!
Great Teacher Onizuka is back, and the next stage for his legend is … prison?! The trouble magnet of a teacher reveals that this stint behind bars is thanks to a certain incident with the class he became assistant homeroom teacher of half a year earlier: Kissho Academy’s new class for high school-aged celebrities! Does he regret the exploits that landed him in the slammer? Heck, no. In fact, he’s all too happy to calmly tell his fellow prisoners how the whole thing went down—if they’re willing to listen to his story from the very beginning…
After accidentally compromising his school’s reputation, Eikichi (a.k.a. the GTO) goes home to the peaceful shores of Shonan to lay low until the heat dies down. However, Shonan itself hasn’t escaped its own share of troubles, and Eikichi is inspired to help a group of troubled foster children get back on the track to happiness. Using humor and a person touch to teach today’s youth, Great Teacher Onizuka continues to impart life lessons while rarely testing kids in the classroom.
Brought up by two strict teachers, it was only natural for Sakamoto to pursue the same career path as his parents, and after years of study finally sets foot in a high school as a fully-fledged educator. Only problem is, he's only now just realised he really, really, really doesn't want to be a teacher! Thus starts Sakamoto's frantic search for any opportunity to resign, from starting scandals to showing his unprofessional side at work. But he's just that good of a teacher that they're not willing to let him go! Not to mention his eccentric co-workers, the bespectacled Nanba-sensei and the ditzy Shiina-sensei, just adore him. Will Sakamoto ever find a way out of this living hell?
A sloppily worn lab coat, lifeless eyes just like a dead fish's. He's the most un-teacher-like high school teacher, Sakata Ginpachi. The class he's in charge of, 3Z, is filled with 'intensive' students who have created a horrifying amusement park.