In the year between leaving Hogwarts and being confined to domestic servitude by Ron, Hermione had undertaken much work experience at the Ministry of Magical Governance, including in the Education Department, where she had watched this new curriculum be drafted. Appalled and disgusted, she snuck into the magical printing press one night, where the first copies were being rolled out, and flung a wooden shoe, called a Sabo, into the machines to stop them.