Additional study resources for the topics covered thus far

CodeAcademy is a great resource for both paid and free courses. The following FREE courses are recommended after completion of this course to further advance your skills, especially in HTML5, CSS3 and JavaScript:

How to make a WebSite.
Introduction to JavaScript.

To further advance your JavaScript skills and to pick up a relevant framework it is worth checking out React.js.

React 101.
React 101.

Lynda is a great resource and available to Amazon employees.

Anyone interested in Backend engineering should consider the following Node.js modules on Lynda.com:

A video that explains why Node.js.
Full stack JS based on Node and React with MongoDB.
Node.js essential training.

An article about Lynda courses, which are free for amazon employees can be found here.

An additional link.

Codewars

There are many great practice ‘DoJos’ where you can practice your coding skills.

CodeWars.
HackerRank.