One of the first git tutorials I've ever used that did something along the lines "But wait, that's not a very good commit message. What does patch actually do? Let's write a better one" Very simple example but that level of care / attention to detail put a big smile on my face (especially as someone that's been teaching git for a year)
I went through the git module and plan on sharing this with my students for refreshing / getting an intro on some concepts.
I have learn through many tutorials, free and paid. Progate is better than every free tutorial right now and better than some paid too. I hope you keep building the site.
I have been in the ed-tech industry for the last 3 years and I can confidently say that no other service has the potential for mass adoption as this one - huge potential in the Indian ed-tech market too.
Although I tried dotinstall and Schoo, they were very boring and difficult to understand it. On the other hund, Progate helped me to learn programming.
You'll love this. There are many like Udemy, Codecademy, CodeSchool, Udacity, etc and I have tried them all but I find it hard to retain the basics. With tremendous practice, no doubt, you'll be able to master them but here you get hands-on experience and the lessons are put in such a manner that you'll be able to grasp all the basics and retain them later. 10/10 recommended