https://algocademy.com/?referral=hackernews

Back in 2018 when I was learning React on Codecademy, I realized their coding tutorials were frustrating because you needed to write the code exactly as they wanted, even if there were multiple ways to do it. Also the tutorial steps were not granular enough. If they ask you to write a for loop, you need to write the whole thing on your own, instead of being guided at step-by-step. Another thing that CodeCademy wasn't good at: teaching you the thinking process behind coding. It took me around 7 months to develop the interactive tutorial engine that improved on what CodeCademy offered.