Keep in mind that they're innocent little children in this for the most part.

Italy
That good child who is too precious for the world

Germany
Trying his best to impress the teachers but always gets dragged into trouble

Japan
Always in the corner reading stuff

America
Volunteers to be that kid who tells the teacher whenever someone talks during class, etc. He turns himself in for drawing a picture that calls the teacher a butt head

England
Always gets in trouble for calling America a bloody git

France
Flirting with all of his female classmates

China
Brings his panda for show and tell

Russia
Makes teacher suspicious of the metal pipe but in the end she decides that he's too cute to be suspicious of

Romano
Gets sent home early because he uses bad words

Canada
Shows up at school on time everyday but is always counted absent

Prussia
Drags his brother in to trouble all the time

Hungary
Hits Prussia with the plastic frying pan located in the play house

Austria
Impresses teacher with his piano skills until Prussia starts screaming for the fun of it

Denmark
Likes to cause trouble with Prussia but also gets in fights with Sweden

Norway
Choking Denmark by his t shirt and gets the teacher make Iceland call him big brother

Iceland
Likes to explore tumblr with Hong Kong until the teacher made him call Norway his big brother

Sweden
Has a hard time making friends because of his scary face but sometimes helps the lunch ladies make meatballs

Finland
Sweden's only actual friend who gives everyone presents around Christmas time

Belarus
Follows Russia around saying 'Date me, big brother' She also plays house with him being the mommy and Russia's the daddy against his will

Ukraine
That one kid who wears a b-cup when they're 5 human years old

Lithuania
Has a crush on Belarus and plays on the computer with Estonia and Latvia

Estonia
Computer hog but shares with Latvia and Lithuania

Latvia
Always playing with Estonia on the computer and sometimes Lithuania joins