Yuru Yuri, Gakkou no Sensei Recommendations
Both are shoujo-ai comedies and take place in a school. Gakkou no Sensei is somewhat more mature and has more ecchi scenes while Yuru Yuri is more cute with not as many ecchi scenes (Although I think the only ecchi scenes are in Chitose's fantasies.).
Both feature an otaku (Kyouko and Yuriko), a down-to-earth and somewhat tsundere character (Yui and Sakura) and a loli (Akari and Akane). Well, Yuru Yuri probably has more than 1 loli since they're middle schoolers. YRYR has more than 1 tsundere, as well. At least 3 of the characters are tsunderes.
Gakkou no Sensei follows a group of new teachers