Question: how many episodes are there in assassination classroom season 2

title: List of Assassination Classroom episodes
text: While Koro - sensei is reading a newspaper , Nagisa encourages Tomohito Sugino to attempt to assassinate Koro - sensei by a pitching a baseball embedded with pellets . However , Koro - sensei easily dodges the baseball and catches it with a baseball glove . Later after lunchtime , Sugino is downhearted when Koro - sensei crushes his dream of being a pro baseball star , but this is due to his wrists and elbows not being as flexible as they should be . Koro - sensei encourages Sugino to focus on his own strengths for future attempts of assassination . The students of Class 3 - E fail to kill Koro - sensei , even when he deliberately ties himself to a tree branch . Karasuma joins Class 3 - E as the physical education teacher , observing how the class is ridiculed by the other students of the school . Another student due to transfer into the class is informed of his mission .