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Next morning, the front page article of the Daily Prophet is, "MINISTRY SEEKS EDUCATIONAL REFORM – DOLORES UMBRIDGE APPOINTED FIRST EVER HIGH INQUISITOR" (15.1).
The article claims that Professor Umbridge has been "an immediate success" (15.5) as Defense Against the Dark Arts Teacher as Hogwarts.
So, the Ministry has appointed Professor Umbridge to inspect "her fellow educators and make sure they are coming up to scratch" (15.9).
The article also contains a quote from Lucius Malfoy saying that he's glad that there is someone in place at Hogwarts to oversee Dumbledore's decisions.
They get through History of Magic and Potions without seeing Professor Umbridge.
In Potions, Harry gets his essay back with a "D" on it – D for Dreadful.
Professor Snape claims to have graded according to OWL standard, where "O" is Outstanding, "E" is Exceeds Expectations, "A" is Acceptable, "P" is Poor, and "D" is Dreadful.
Fred and George claim that there is a grade called "T," Troll, but Harry isn't sure if they are joking.
Professor Umbridge does come to observe his and Ron's Divination lesson with Professor Trelawney.
Professor Umbridge turns on Professor Trelawney and demands that she demonstrate her psychic abilities right here, right now.
Of course, Professor Trelawney goes into her usual spiel about grave peril.
Professor Umbridge notes something down on her clipboard and says on, "Right [...] Well, if that's really the best you can do" (15.101).
Ron and Harry agree that Professor Trelawney is a fraud, but they still feel bad for her in this moment.
In Defense Against the Dark Arts, Professor Umbridge makes her class read again.
Hermione has already finished the whole book.
Professor Umbridge tries to stump Hermione with a question from Chapter Fifteen, but Hermione gets the question right.
Then, Hermione dares to disagree with the conclusions of the author.
Professor Umbridge takes Gryffindor points to punish Hermione for being outspoken.
She also says that the only decent Defense teacher they have ever had was Professor Quirrell (from Book One).
Harry shouts out, "Yeah, Quirrell was a great teacher [...] there was just that minor drawback of him having Lord Voldemort sticking out of the back of his head" (15.127).
Of course, Professor Umbridge gives Harry more detention.
Angelina Johnson is also furious at Harry for getting detention, since he's missing more Quidditch practice.
And Professor McGonagall takes points from Harry for continuing to make Professor Umbridge angry.
Professor Umbridge comes to their next Transfiguration class to observe Professor McGonagall.
Professor Umbridge keeps trying to interrupt Professor McGonagall, but Professor McGonagall refuses to be put off.
She's too tough for Professor Umbridge to shake.
Professor Umbridge comes to Care of Magical Creatures and asks Professor Grubbly-Plank if she knows, "what is causing Professor Hagrid's very extended leave of absence?" (15.176).
Professor Grubbly-Plank says she doesn't know.
But Professor Umbridge keeps asking the students about what Hagrid's class was like.
Draco seizes the opportunity to talk trash about Hagrid, as he loves to do.
That night, when Harry leaves detention, his hand is bleeding so badly he needs to wrap it in a handkerchief.
Ron and Hermione are waiting with a Murtlap tentacle solution to make his hand feel better.
Harry continues to refuse to tell any of the professors what Professor Umbridge is doing to him.
Hermione is outraged that they don't have a decent Defense teacher during their OWL year.
What she wants is "a teacher, a proper one, who can show us how to use the spells and correct us if we're going wrong" (15.215).
Hermione wants Harry to teach them Defense Against the Dark Arts.
Harry is stunned. He thinks Hermione must be joking.
But Ron agrees with Hermione.
Harry tells them, "You don't know what it's like! You – neither of you – you've never had to face him, have you? You think it's just memorizing a bunch of spells and throwing them at him, like you're in class or something?" (15.247).
Hermione and Ron both assure Harry that that's why they need him. They need a teacher who knows what it's like to face Voldemort.