There are many websites which teaches you web programming languages. but many of them charge for online training. W3schools is one of the best websites which provide good information on many web development courses like HTML, CSS, Java Script etc. I learnt HTML and CSS from this website. The good thing about this website is no sign up procedure.
Every one can easily access any course which is available on the site. Good illustration of examples wherever necessary. You can get overall view of the language. The bad thing is that the loading time is little bit more. You have to pay, if you need any certificate. But to learn and make notes, this is the best choice. You can implement your HTML Code on "Try it yourself " section. I would recommend this site to all the beginners.