The trick to geography is that once you've looked at the map and memorized it, if you scribble in a notebook the teacher will more or less ignore you. Emily isn't getting any reading done, but at least she can work on filling out her times tables.

She's recently completely filled one notebook, though, so she reaches for the nice purple notebook that her parent bought her last weekend and flips to the second page. With a careful grip on her pencil, and a studied ignorance of Mrs. Mont, she begins to write:

Times Table — Base Eight, Mod Thirteen