snape was the dada teacher in half blood prince.
who was the dada teacher in half blood prince?
snape
the students return to school, where dumbledore announces that snape will be teaching defence against the dark arts. in the meantime, horace slughorn will resume his previous post as potions teacher. harry now excels in potions, thanks to having received a used potions textbook that once belonged to someone named "the half-blood prince," a mysterious former student who wrote numerous tips and spells in his potions textbook. harry uses this information to achieve superb results. during a class contest, the half-blood prince's tips help harry win a bottle of felix felicis, more commonly known as "liquid luck." though harry's success pleases slughorn, his newfound brilliance in potions angers hermione, who feels he is not truly earning his grades and also does not trust the half-blood prince.
harry potter and the half-blood prince
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tokenization (data security)