date topic
124 Aug Slides
224 Aug Space-time plot [grid]
324 Aug Space-time plot [data]
424 Aug The roots of our place-value system
531 Aug Slides
631 Aug Continued fractions
77 Sep Slides
814 Sep Slides
921 Sep Slides
1021 Sep Low-degree equations: a rapid survey
1128 Sep Slides
1228 Sep Cardano's formulas
135 Oct Slides
145 Oct Projective geometry
1519 Oct Slides
165 Nov Art history quiz: part II
179 Nov Slides
189 Nov Chinese binomial triangle from 1303
1916 Nov Slides
2023 Nov Slides
217 Dec Slides