Rookie Instructor Iruka

is episode 176 of the Naruto: Shippūden anime.

Synopsis
Watching Konoha celebrate Naruto Uzumaki's victory, Zetsu decides to report to Madara Uchiha of Nagato's death. Elsewhere, Team Samui head out to Konoha. Iruka Umino goes to the destroyed Ninja Academy where he has a flashback of when he first became a teacher.

In the flashback, Iruka has just become Naruto's Academy class teacher. A colleague teacher of Iruka advises him to not mistreat his students so that they will not cause trouble, but Naruto still causes mischief, as he is pained by his teacher's words to his classmates to ignore him and to not get involved with him. Lastly, Naruto discovers that Sasuke Uchiha is the only survivor of the Uchiha clan.