Following along with the rest of class, Heather was puzzled when they stopped at a concrete slab. When did that appear? She didn't remember seeing any concrete here at Hogwarts before. Nope, it was all stone. She didn't even know wizards knew what concrete even was. And there was CHALK stacked beside the professor, which now she was itching to get her hands on. The chalk, of course, not the professor. Heather loved chalk and the feel of it and the smell....

She followed directions though and plopped down in the circle.