The teacher, the most brilliant and amazing and kind person she already knew had gone away and left them alone to brew a potion by their own. It was so sad... Who had called her and what could be more important than teach them to prepare potions? Annabeth thought, while thumbed through her Potions book.
Why it doesn't have any interesting potion? Something really useful, as Veritasserum or its antidote... Hm, Antidote for common Poisons shall be interesting... Let me try.
She opened her book at the page, 347 and read:
She thought it seemed to be easy and began to pick up the ingredients. She was happy that she would have to use her shiny new cauldrons. The girl pointed her wand to the three cauldrons and cast the cleaning spell three times.
"Scourgify! Scourgify! Scourgify!"
Then she took a bezoar, put it into the mortar and crushed it with the pestle quickly.
Crush. Crush. Crush.
Done.
She was about to put the four measures into the cauldron when she realize it was dry. But the procedure or the ingredients didn't ask for water. Although, if it was a potion, it should need water. She pointed her wand to the cauldron.
"Aguamenti!.... Finite!" Half-cauldron filled with water seemed to be enough. The smiled at her cauldron and added the four measures of the crushed bezoar.