Reminds me of this startup that makes deformed football (soccer) balls for training [1]. In [1] the founder calls it "differentiated training", but that doesn'

Reminds me of this startup that makes deformed football (soccer) balls for training [1]. In [1] the founder calls it "differentiated training", but that doesn't seem to be an established term in English. There's a wikipedia article on "differentiated instruction" [2], but that seems to be specific to a school context. I only really found information on it in German, e.g. [3]. [1] https://www.zdnet.com/article/qa-mario-sinnhofer-on-rethinking-the-soccer-ball/ https://www.zdnet.com/article/qa-mario-sinnhofer-on-rethinki... [2] https://en.wikipedia.org/wiki/Differentiated_instruction https://en.wikipedia.org/wiki/Differentiated_instruction [3] https://soccerkinetics.de/differenzielles-lernen-fussball/ https://soccerkinetics.de/differenzielles-lernen-fussball/