"Before we start our lesson, I would like to ask you something". "What is a patronus?" wondered our professor. Honestly, everybody knew what is a patronus, but nobody could answer since they couldn't find a clear sentence to explain it.
"A patronus, is a defensive spell which produces a silver, animal guardian, used to protect a witch or wizard against Dementors". "You should all note that your patronus is more likely to be produced if you think or remember your happiest memory: whether you're gathered with your cousins, family or friends, this memory must bring the joy out of you because when you're attacked by Dementors, happiness will be likely to disappear from earth...so to defend yourself, you should think of your happiest memory in order to make him go away from you, understood?"
"Understood." the students approved as she finished her sentence
"Now to produce a patronus, you should know the incantation: Expecto patronum, which means in Latin: I await a guardian. Everybody, repeat: Expecto patronum."
"Expecto patronum" we said.
"Very good, now, getup, make a group of 6 students, with boys and girls together and try to cast apatronus".