A small, almost imperceptible difference in nightly sleep duration is tied to outsized differences in academic outcomes: research ties roughly 15 extra minutes of sleep to the gap between earning an A versus a B, and roughly 11 minutes to the gap between a B and a C. The effect size is strikingly disproportionate to the input — minutes, not hours, of sleep — which argues against treating sleep as an all-or-nothing binary ("did I get enough sleep") and for treating it as a continuous lever with real marginal returns even at small margins. This generalizes the athletic-performance framing in Sleep Extension for Athletic Performance to academic/cognitive performance outside of sports, and reinforces Sleep Debt Accumulation and Banking's point that even modest debt has a measurable cost.