everyone and their nana uses w3schools but i cannot stress how much its helped me! i basically learned how 2 code from w3schools
lots of css and html effects here! really good website 2 use for spicing up ur page
a website similar to dynamicdrive, i dont use this one too often tbh
self explanitory name.
this one's probably my favorite, theres a whole load of indepth CSS tutorials here. This website looks more modern than the rest too, i really like the way its structured.
an excellent website where you can ask questions about code and get quick feedback, if anything ever goes wrong with ur code stackoverflow is the place to go to!