1. Charms practice backfired, sending my entire bag into flames.
2. I dropped it and the wind carried it under the Whomping Willow
3. I spilled invisible ink on it.
4. Peeves stole my bag and hid it in the Room of Requirement...
5. Professor Trelawney said that if I turned it in, it would start a series of events leading to my death.
6. I had an accident at Professor Lockhart's dueling club.
7. I was practicing memory charms when my wand suddenly backfired. It wiped my memory of what the assignment was.
8. My Monster Book of Monsters tore it up
9. Ron Weasley coughed slugs all over it after his wand backfired.
10. I thought homework was cancelled because there was a murderous creature on the loose around campus.
11. A House Elf threw out my homework when he was cleaning the common room.
12. I got hit with a bludger during quidditch practice.
13. I let Neville borrow my notes and he forgot where he put my notebook.
14. The giant squid attacked me and my homework got wet.
15. I dropped my bag when I was practicing how to apparate.
16. The Weasley twins cast a vanishing spell on my notebook.
17. I dropped it while running from the troll that attacked the girls bathroom.
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