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Notes are distributed to the students prior to the lecture. We distributed paper copies, with the notes formatted using a modified form of the \verb|tufte-handout| style \citep[see, e.g.,][]{Tufte1983The-Visual-Disp}. We adopted this layout for several reasons:  it has a large right margin in which the students can write notes;  it features tight integration of text and graphics, which reduces skipping back and forth; and  it implements margin notes, which we use for quick reminders of mathematical formulae and side remarks. For an example, see Fig.~\ref{f.sample-handout-page}. Sketches for the handout handout, as shown in Fig.~\ref{f.sample-handout-page},  are made using the \href{https://evernote.com/penultimate/}{Penultimate} app on an iPad. Exercises are built into the text. Typically a few are assigned as ``reading exercises,'' to be completed prior to the start of lecture. Longer, more involved problems are then assigned as homework following the lecture. Solutions, which are written in the same format as the lecture notes, are distributed when the marked assignments are returned, and the solutions are discussed in lecture.