26 details you probably missed on season 2 of 'Glee'

On the first episode, sign-up sheets are displayed throughout the school. They include some for the Mock United Nations, chemistry, and gardening clubs.

But there is also a sign-up sheet for a fruit-sculpture club and one for a texting competition.

Coach Sue (Jane Lynch) adds jokes and insults to the glee-club sign-up sheet.

Mr. Schuester (Matthew Morrison) reads the first two names out loud but doesn't read the insults, which are "eat a bowl of balls" and "you are the suck."

When Sam (Chord Overstreet) auditions for the glee club with "Billionaire," a handful of band members are in the room playing instruments.

However, one member can be seen standing behind Finn (Cory Monteith) without any instrument and with his hands in his pockets.

There's no clear reason why he's in the room at all.

Emma (Jayma Mays) can be seen organizing the collection of pamphlets throughout the series.

When she is sorting them in the second episode, there are two that are visible from the previous season titled "I still breastfeed ... but how old is too old" and "Wow! There's a hair down there!"

There is also a new pamphlet, "Proper Wiping: Easy as 1-2-3."

Finn's locker has the school's bell schedule taped inside the door, along with a William McKinley logo and football magnet.

There's also a trident magnet that seems to represent the school's mascot, the Titans.

The bottom of his locker shows a drum magnet.

Rachel reads a Britney Spears book while waiting for her dentist appointment with Carl.

The book, "Britney Spears an Unauthorized Biography" doesn't seem to exist.

Although there is a biography with this title, there aren't any editions that feature the same cover.

During the first season, Finn mentions that his bedroom at his mom's house is actually a closet.

Later that season, he moves into Kurt's dad's house.

Finn's bedrooms should have a different set, but the third episode shows the exact same wallpaper that was in the first season.

He could have set his new room up with the same wallpaper, but the layout also looks identical.

Coach Sue wears a megaphone necklace with her signature tracksuits throughout the first season.

She wears the same necklace throughout this season as well.

Coach Sue decides to marry herself and sends out wedding invitations for the ceremony.

There are hundreds shown in her office, but they don't show any information about where or when it will take place.

Puck (Mark Salling), along with several other football players, locked Artie (Kevin McHale) in a portable bathroom in season one.

During this season, several football players lock Puck in one.

Finn mentions a calendar Rachel (Lea Michele) made for him showing all their scheduled dates during the first episode.

It's shown after the couple breaks up.

The 2010 Finchel calendar shows their faces photoshopped onto two cats.

Rachel decides to perform "Merry Christmas, Darling" after Finn leaves since the AV club already helped her set up fake snow.

Plenty of other performances had unexplained special effects.

Somehow, the glee club was able to arrange water effects during the "Umbrella" and "Singin' in the Rain" mashup, as well as sparklers during "Fireworks" and a massive light board during "Nowadays/Hot Honey Rag."

There is never any explanation on how the club can afford this as they are struggling to raise money for transportation to Nationals.

In the pilot episode, Rachel described gold stars as her "thing."

She places a sticker next to her signature for glee-club tryouts and has a gold star-studded cup from her mother.

Finn's Christmas gift for her fits the theme as well.

The glee club wears plaid for their performance of "Sing" as they practice anthem songs.

Coach Sue is temporarily in New Directions at the time and performs with them.

She wears a plaid tracksuit that keeps to her tradition of almost exclusively wearing them.

When the glee club drinks at Rachel's house, she leads them past a hallway with a painting.

It appears to be a portrait of Rachel.

Brittany (Heather Morris) is on the cover of a cheerleader magazine that's hung in her locker.

The magazine has taglines like "Kiss My Poms," "Squad Love," and even a reference to the glee club's signature song, "Don't Stop Believing in Brittany."

She also seems to have a doll head on her locker door.

The agenda in Rachel's locker includes sending Barbra Streisand a friend request and remembering Celine Dion's birthday.

On "Born This Way," Rachel emphasizes how much she idolizes Streisand's iconic voice.

When Holly gives Emma and Carl (John Stamos) marriage counseling, the group meets in the health classroom.

There are condom posters around the room and the whiteboard has "I will not laugh during Sex Education class" written on it multiple times.

Brittany wears an orange hat to school twice throughout the season.

She is first seen wearing it when promoting Rachel's fashion in "Comeback." She's spotted in it again while watching Mercedes (Amber Riley) perform "Original Song."

Mike (Harry Shum Jr.), Tina (Jenna Ushkowitz), Artie, and Brittany are on the school's academic decathlon team, the Brainiacs.

During the "A Night Of Neglect" episode, the team can be seen doing what appears to be a club handshake twice.

Each member claps their hands, touches the top of their arms, and imitates pushing their glasses up.

Coach Sue revives the school newspaper, The Muckraker, to spread rumors about the glee club.

The club motto, "If I heard it, it's probably true or something," is written on the blackboard during one of their meetings, along with their rules about preferring gossip to facts.

The motto also appears on the front of the school newspaper with a headline about Will planning to leave the school.

The back of the paper has local advertisements and a banner about supporting the school's football team.

In the background of Brittany's web show "Fondue for Two," there's a plush doll with blonde hair and a Cheerios uniform.

Santana (Naya Rivera) offers to have the Bullwhips, the anti-bullying club she created with Karofsky (Max Adler), escort Kurt (Chris Colfer), and Blaine (Darren Criss) to prom.

She claims the group will be like the Hell's Angels when the Rolling Stones performed at Altamont Speedway, adding, "I think that went off without a hitch."

The Rolling Stones performance at Altamont Speedway infamously did not go well and saw several accidental deaths.

During the prom, another student walks by wearing almost the same red dress as Santana.

She looks annoyed for a moment before shaking her head slightly, apparently deciding against fighting with her.

When the glee club attempts to write their Nationals songs in their hotel room, they complain about having nothing around to inspire them except random objects in the room.

Brittany writes about a cup, which she can be seen tracing on her notebook before she sings "My Cup."

Mr. Schuester gave the New Directions rhyming dictionaries to help them write original songs for Nationals.

Finn can be seen writing his own list of rhymes. It starts with "pain" and includes "rain," "sane," and "strain."