Merge pull request #372 from malevolentninja/patch-1

Update tutorial.md

Author: richardwestenra

html/lesson6/tutorial.md

@@ -143,3 +143,27 @@ This ends our sixth lesson. How did you find learning HTML and CSS? If you have
 ## Extras
 
 Now that you are familiar with HTML & CSS, how about you create your own portfolio site. Think about the pages that you may include, such as home, about me and a portfolio or gallery page. You may even want to include a downloadable CV.
+
+## Further Reading:
+### Accessibility
+
+Some of your users might be using screenreaders or keyboards to navigate across your page. How do you ensure your website is available to them? By following a few guidelines and integrating particular techniques.
+
+#### Acronyms to know:
+- (ARIA) Accessible Rich Internet Applications are set of techniques and additions to HTML to allow additional markup to be interpreted by accessibility devices.
+- (WCAG) Website Content Accessibility Guidelines contain different compliance levels (A, AA and AAA) and lay down the “rules” to make a website or application accessible.
+- (WAI) The Web Accessibility Initiative is a part of the W3 consortium that works on accessibility standards, guidelines, rules and techniques.
+- (a11y or A11Y) is an abbreviation/numeronym for accessibility. The number 11 refers to the number of letters omitted.
+
+#### Articles for getting started with accessibility:
+- [Introduction to Accessibility](https://www.w3.org/standards/webdesign/accessibility)
+- [WAI Getting started](https://www.w3.org/WAI/gettingstarted/)
+- [How People with disabilities use the web](https://www.w3.org/WAI/intro/people-use-web)
+- [Tutorials](https://www.w3.org/WAI/tutorials/)
+- [Mozilla have created their own Accessibility page](https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA)
+- [ARIA Techniques for WCAG 2.0](https://www.w3.org/TR/WCAG20-TECHS/aria)
+- The [A11Y Project](http://a11yproject.com/) is an open source project on providing the most up to date and easy to access information regarding accessibility.
+
+#### These extensions are handy if you wish to check if your website meets the criteria and areas to improve:
+- Chrome: WAVE Evaluation Tool
+- Firefox:[AInspector](https://addons.mozilla.org/en-US/firefox/addon/ainspector-sidebar/)