I don't need a folder- they're heavy. The book is heavy too. I think I left it at Takumi's.

[ Teaching Mafuyu is apparently a community effort, with her books and notes scattered among more responsible parties. And now it's their turn. Digging around one of the zipper pockets in her backpack, she produces a pencil— it's snapped in half, but the point is still there, only lightly dulled from unuse.

The pencil, and the paper, she hands over. ]

It's science class. You guys learned this, right? What's number two?