Bet Better Teaching Dataset 2026: sports results, model projections and closing prices (NFL, MLB, NBA, NHL, AFL, NRL)

One row per completed game across six leagues (NFL, MLB, NBA, NHL, AFL, NRL), built from Bet Better's own score, model and closing-price tables. Each row carries the final score, the model's projected margin and total before the game, the closing bookmaker prices and the graded result, so a class can test whether bookmaker prices are well calibrated or whether a projected margin beats the closing line, without scraping anything. A plain-English codebook explains every column and suggests three exercises. Living version and codebook: https://betbetter.world/studies/teaching-dataset . Related open data: the daily bookmaker margin index https://betbetter.world/studies/margin-index and the market calibration study https://betbetter.world/studies/market-calibration . Also mirrored at https://huggingface.co/datasets/edushinka/betbetter-teaching-dataset-2026 . Free to reuse with a credit to Bet Better (https://betbetter.world).