Love it! Last summer I put together a flag quizzing game with my niece, who's a geography nerd: https://flagsaroundthe.world/ https://flagsaroundthe.world/ I

Love it! Last summer I put together a flag quizzing game with my niece, who's a geography nerd: https://flagsaroundthe.world/ https://flagsaroundthe.world/ I think minimally contrastive examples work well for learning, i.e. you want to first learn to distinguish between broadly different categories, and focus on more and more similar examples over time. This little app doesn't have scheduling at all, it just samples examples based on previous responses, so sampling examples you got right exponentially less often as you keep answering correctly. I think sampling has some interesting advantages to SRS scheduling actually. Add new "items" becomes a straight sampling problem, where you can set a constant probability for each item that hasn't been seen yet.