Website development course HTML5, CSS3, RWD Basics of HTML5, CSS, semantics, good code writing practices and RWD, i.e. responsive websites! What you’ll learn? In this part of the course, you will learn HTML5 and CSS3 from scratch. You will also create your first two websites! You will learn how to create responsive websites. You will learn what the Terms ‘mobile first’ is and why it is so important. You will learn good code writing practices used by developers with many years of experience!