As I am in IT student I used to learn many of the programming languages like cplusplus HTML JavaScript dotnet python.
I was supposed to get all these in a single pack.
So I started searching a lot and I got to the w3school website it gives a lot information in all over the programming and we get the main focus is on html.
One can learn as it is an open source website you can be certified by paying some a very little amount of money de sertification valid.
The website is user friendly if one do not want to search again and again for the website then he is she can download we have available on the PlayStore there is w3school we can get most of the things like HTML CSS JavaScript python and many more I do have the same app to learn and be more active on programming languages .
To learn w3school.com is very good place. .