Fractions take up No Space: Rationals Have Measure Zero (TANTON Mathematics)

From a channel Lumen includes in full: James Tanton is a mathematics educator, and every sampled transcript is a direct lesson or proof: sequences and difference tables, axiomatic and geometric arguments for negative times negative, the star angle sum, the Curry's paradox demonstration, and Fibonacci partitions. Titles are descriptive math topics. The occasional emphatic phrasing ("YOU DON'T NEED IT!", "is NOT") states the lesson's actual claim rather than withholding information, so it is not clickbait. There is no entertainment, promotion or opinion content in the sample.