I think onlly three because they started as sophmores so there are only three years of high school from there and in the season two finale Finn said to rachel that they have one more year left, and i really don't want glee to end OS soon.
Glee has 5 season but some people say that there are 6
Netflix has all 6 seasons of
3 with a 4th planned
Cory appears in person for four seasons, and is paid in homage to in the fifth season in "The Quarterback".
Season 1 is out and half of season 2 is out on Netflix
On April 9, 2012, Fox renewed Glee for a fourth season. Ryan Murphy has confirmed that all regular cast members from the third season will be returning to the show for its fourth season, though "it doesn't mean everyone will be doing 22 episodes".
There are currently 4 complete seasons of Glee, but they have signed on to do an additional 2 seasons, meaning there will be 6 seasons so far. (As of summer 2013).
Two, at this time (8 January 2011) there are two seasons and a third has been already recognised.
You can watch all seasons of Glee on Netflix.
They stayed in The Four Seasons.
By buying all of the seasons on DVD.
don't know but glee is awesome