According to this tweet, he used Math Academy. “ Excited to see a @_MathAcademy_ student blowing up Hacker News with some insights they've realized about the p

According to this tweet, he used Math Academy. “ Excited to see a @_MathAcademy_ student blowing up Hacker News with some insights they've realized about the process of learning math!” https://x.com/justinskycak/status/1827397012758917622?s=46&t=E3U2EI7EXIhlBQmxg6oZ2g https://x.com/justinskycak/status/1827397012758917622?s=46&t...