Although Horace Slughorn had agreed to come to Hogwarts School of Witchcraft and Wizardry in exchange for Dumbledore and Anton's protection and to help Anton promote the Muggle-to-Wizard Transformation project, Dumbledore first took him around to get familiar with the curriculum.
Time was tight. He had to teach one lesson each to the First Years and Fifth Years tomorrow.
He needed to consult Professor Fiennes first and find out how far along each year's students were in Potions.
Of course, that wasn't difficult for him.
Professor Slughorn had taught at Hogwarts for a very long time. He had already been the Potions professor before Tom Riddle and Hagrid's year, and had continued teaching until after the year of Snape, Lily, and Sirius.
He knew the school and the classroom inside out.
But this old professor, who had longed for a peaceful retirement, would probably have to face an increasingly competitive Hogwarts. All the professors were writing new textbooks, and they had to be better than the textbooks at Azkaban Academy!
Oh, and it wasn't just competition with his colleagues or Anton's group. They were competing with their peers across the field, too.
After all, the Dumbledore who had urged those professors to adapt their lessons to the changing times had actually been Grindelwald in disguise.
And now, Grindelwald had become the headmaster of Durmstrang Institute.
Durmstrang had practically become a sanctuary for the old Saints. Master-level Wizards were everywhere.
One could imagine how much the entire field of magical education would change, with two such Magic Schools setting the tone and Anton's Azkaban Academy serving as a point of comparison.
Even Professor Snape, supposedly the least ambitious of them all and utterly disillusioned, had been influenced by Anton. He had coauthored a specialist Potions book with Fiennes, The Vital Body