This is a form of poetry commenly used among school children-and acrostic. The first letter of each line spells out a word or name.
"Professor Quirrell, in his absurd turban, was talking to a teacher with greasy black hair, a hooked nose, and sallow skin.
It happened very suddenly. The hooked-nose teacher looked past Quirrell's turban straight into Harry's eyes- and a sharp, hot pain shot across the scar on Harry's forehead."… "Harder to shake off was the feeling Harry had gotten from the teacher's look- a feeling that he didn't like Harry at all."
-PS, Ch. 7, "The Sorting Hat"
Severus Snape
"The Half-Blood Prince"
Snape, the Potions teacher, whom nearly
Everyone despised. Little did they know he kept a
Very deep secret, the only one who
Ever knew was Dumbledore, who
Readily helped Snape and was extremely
Understanding. No one ever guessed that Snape was a
Spy.
Snape was hated for killing Dumbledore, but
Nobody knew is was part of the plan,
And in the end the slimy
Professor would prove to be a hero for
Everyone.
"And then Voldemort swiped the air with the Elder Wand. It did nothing to Snape, who for a split second seemed to think he had been reprieved: But then Voldemort's intention became clear. The snake's cage was rolling through the air, and before Snape could do anything more than tell, it had encased him, head and shoulders, and Voldemort spoke in Parseltongue.
"Kill."
There was a terrible scream. Harry saw Snape's face losing the little color it had left; it whitened as his black eyes widened, as the snake's fangs pierced his neck, as he failed to push to enchanted cage off himself, as his knees gave way and he fell to the floor.
"I regret it," said Voldemort coldly."…
"When the flash was full to the brim, and Snape looked as though there was no blood left in him, his grip on Harry's robes slackened.
"Look…at...me…" he whispered.
The green eyes found the black, but after a second, something in the depth of the dark pain seemed to vanish, leaving them fixed, blank, and empty. The hand holding Harry thudded to the floor, and Snape moved no more."
-DH, Ch. 32, "The Elder Wand"