"Earth to Miss. Crawford. I hope I'm not keeping you from something," Ms. Barnes's voice interrupts my thoughts.

And everyone is staring at me again. Even Brad. But at least he's not snickering under his breath.

"I'm sorry, what?" I look up at the teacher, catching her slight eye roll.

"I just asked if you knew the degrees of the Tropic of Cancer and the Tropic of Capricorn?" She slowly smiles, as if she's stumped me.

"Oh, um..." I pause for a second, ...