@Amethyst Star  
EXACTLY

It’s the Ponyville Schoolhouse Lyrics
 
C-H-E-E-R-I-L-E-E P-O-N-Y (That’s me.) C-H-E-E-R-I-L-E-E P-O-N-Y.  
It’s the Ponyville Schoolhouse, Come inside, It’s twilight time, It’s the Ponyville Schoolhouse. (FOAL CALL!) DINKY! (Sparklings!) RUBY PINCH! (Here!) MANGO DASH! (Ha ha, Here!) AURA! (Yipee!) LIZA DOOLOTS! (Aww, Here!) CHEERILEE! (Right here!) It’s the Ponyville Schoolhouse, Come inside, It’s twilight time! C-H-E-E-R-I-L-E-E P-O-N-Y! (dings) (It’s the Ponyville Schoolhouse!)

@Korora  
@Background Pony #5013  
Looks like she’s going into the family business!
 

@Background Pony #7B03  
Well, a flashback in “The Perfect Pear” confirms Dinky as the pony version of Gillian from the Hartnell era TV comics.

Uhh…..Dinky? What are you doing here?

Dinky time travle?

Tootsie Flute is one table away from the pony who’s going to be her mom. I’m pretty sure there’s something against that in the time travel handbook.

Twilight=Moondanncer, Lemon Heart=Twinkleshine, Minuette=Sea Swirl, Lyra Heartstring= Amethyst Star, Dinky= Tootsie Flute=Berry Pinch, all same design

dinky confirmed for dhampir

student gets head stuck in flask  
teacher can’t be bothered

Filly Sea Swirl! This 2 second throw-in alone made the episode for me, I was so happy I had to rewind the episode and pause :D

@Background Pony #148D  
I’m pretty sure it means: FUCK, we ran out of ideas for filly designs and I refuse to put in colts!

@marioandsonic  
Maybe it means we shouldn’t take background pony continuity seriously?

@Trahzo  

 
What are you talking about? A filly went to get Ye Flask, and Ye Flask got her instead. The teacher proceed to do nothing, and the way Twilight and Moon Dancer reacted made it seem like such things were a regular occurrence.
 
Sure Twilight wasn’t scared at the time, but after she was Celestia’s student for a while and realized how a classroom was supposed to be run… Well, she probably looked back and never wanted to be there again.

@Background Pony #F476  
I don’t even support Dinky being Derpy’s daughter. ^^

@Background is Best Pony  
Dinky is not Derpy’s adopted daughter. She is a midget who passes as kid to avoid getting a job.

Time Travelling Derplings.

@marioandsonic  
Temporal vacation with Doctor Whooves? Ruby’s there too, so maybe she was allowed to bring a friend.

Wait, didn’t we also see Dinky earlier in the episode?
 
WHAT DOES IT MEAN?!

As you can see, magic kindergarten is not as scary as Twilight thought.

Brings to mind an old head cannon of mine, Derpy was a unicorn once, but magical accident happened and turned her into a pegasus.

@Trahzo  
That’s not Twilight’s hair though! It’s just straight!

Oh god the teacher! Even back then ponies began turning into Spike’s onee chan!

@Background is Best Pony
 
As well as her sister, Amethyst Star.

@Mad Black  
No she doesn’t, it’s thicker.