Victorious

Tori vega

Trina Vega

cat valentine

jade west

beck

Robbie Shapiro and Rex

Sinjin Van Cleef

Erwin sikowitz

Foto assume the following:

The show premiered in April 2010 and most of the characters were sophmores. The show ended in January 2013 and they were all still in high school. The four seasons are not of equal length and do not start or end with any distinct episode. It is unclear when the new school year starts and what grade the characters are in.

Let's assume that:
 * sophmore year = April 2010 - July 2011
 * junior year = August 2011 - July 2012
 * senior year = August 2012 - January 2013