So i was reading OOTP and it was a part where they sat down to write the OWL's and Prof. Mcgo.. told that certain items were not allowed, one of them were remembralls. I was wondering how these would help. The only thing i could guess were that if u missed a question it would become red.
Sneakoscope
Remembrall
Self answer quill
Quibbler glasses
That astronomy globe from book three
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