Update tutorial.md

Included the suggested changes to update the accessibility section

Author: malevolentninja

html/lesson6/tutorial.md

@@ -147,19 +147,23 @@ Now that you are familiar with HTML & CSS, how about you create your own portfol
 ## 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 techniques.
-
-#### A few names 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) Web Accessibility Initiative of W3 cover standard, guidelines, rules and techniques.
-
-#### There is a growing amount of information about accessibilty, here are few articles to get you started!
-- (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 aiming to provide up to date and easy to access information regarding 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/)