Pick Me! In The Classroom lyrics

I know the answers to your questions
So I'll raise my hand up high
But you look past me
And I want to know why.
You know I'm the only who cares,
The only one who reads the books.
But my hand is waving in the air
And you're just giving me dirty looks.

I know the answers.
I know the answers, Professor Snape

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What do you think is the meaning of Pick Me! In The Classroom by The Hermione Crookshanks Experience?