He was using them, wasn't he? Only someone who was using them currently would be so enthusiastic about their students doing the same.

After she had some leaves mushed up, she looked into the mortar. Ew. Looked like... spinach? Ish...?

"You know," she said slowly with a joking smile, nodding, "You could have my mushed up Mugwort leaves, Professor." Hehe. Even the name sounded gross.