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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Class 1 ~ Web Accessibility ~ Girl Develop It</title>
<meta name="description" content="This is the Girl Develop It Web Accessibility curriculum. It was originally developed by Sylvia Richardson and modified by Marcy Sutton.
This course is meant to be taught as a two-week class. The primary slides are designed for maximum presentability--one picture, one sentence. The vertical slides contain speaker notes, to make the slides more useful as a shared resource.
Each of the slides is customizable according to the needs of a given class or audience. The GitHub repository contains an Instructor Guide, with further information about the course.">
<meta name="author" content="Girl Develop It">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/simple.css" id="theme">
<link rel="stylesheet" href="css/accesscustom.css">
<!-- For syntax highlighting -->
<!-- light editor--><link rel="stylesheet" href="lib/css/light.css">
<!-- dark editor<link rel="stylesheet" href="lib/css/dark.css">-->
<!--<link rel="stylesheet" href="lib/css/zenburn.css">-->
<link rel="stylesheet" href="plugin/accessibility-helper/css/accessibility-helper.css">
<!-- If the query includes 'print-pdf', include the PDF print sheet -->
<script>
if( window.location.search.match( /print-pdf/gi ) ) {
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = 'css/print/pdf.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
}
</script>
<!-- If use the PDF print sheet so students can print slides-->
<link rel="stylesheet" href="css/print/pdf.css" type="text/css" media="print">
<link rel="icon" type="image/x-icon" href="favicon.ico" />
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<!-- Opening slides -->
<section>
<img src="img/circle-gdi-logo.png" alt="Girl Develop It" style="max-height: 400px;" class="nonbordered">
<h1 id="slide1">Intro to Web Accessibility</h1>
<h2>Class 1</h2>
</section>
<!-- Welcome-->
<section>
<h2>Welcome!</h2>
<p>Girl Develop It is here to provide affordable and accessible programs to learn software through mentorship and hands-on instruction.</p>
<p class="green">Some "rules"</p>
<ul>
<li>We are here for you!</li>
<li>Every question is important</li>
<li>Help each other</li>
<li>Have fun</li>
</ul>
</section>
<section>
<h2>Introductions</h2>
<p>Tell us about yourself.</p>
<ul>
<li>Who are you?</li>
<li>What do you hope to get out of the class?</li>
<li>What is your favorite 80's song?</li>
</ul>
</section>
<!-- Intro: What is Accessibility?-->
<section>
<h2>Who can use your sites?</h2>
<img src="img/disabled-iphone.jpg" alt="Happy iPhone users"/>
<p class="credit">Photo credit: <a href="http://www.deaftechnews.com/2012/04/17/see-how-blind-people-use-the-iphone-4s-video/" target="_blank" title="Link opens in a new window">DeafTech News<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h2>What is accessibility?</h2>
<ul>
<li>Accessibility is about making your sites useful to as many people as possible.</li>
<li>Accessibility is about overcoming barriers.</li>
<li>Accessibility is about helping your users.</li>
</ul>
</section>
<section>
<h2>Why worry?</h2>
<img src="img/accessdogs.jpg" alt="Dogs outside door, captioned 'We R UR community, beggin fer access'"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/circulating/997909242/" target="_blank" title="Link opens in a new window">circulating<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc-sa/2.0/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h2>Why make your sites accessible?</h2>
<ul>
<li class="fragment">Expand your potential audience! 54 million people in the US have a disability, 1.8 million are unable to see printed words, and 16.1 million have a cognitive or mental illness that impedes daily functioning (<a href="http://www.census.gov/newsroom/releases/archives/facts_for_features_special_editions/cb10-ff13.html" target="_blank" title="Link opens in a new window">source<span class="visuallyhidden"> opens in a new window</span></a>).</li>
<li class="fragment">Be in compliance with legal guidelines, like Section 504/508 and WCAG 2.0.</li>
<li class="fragment">Avoid <a href="http://accessibletech.org/access_articles/legal/courtCases.php" target ="_blank">potential lawsuits<span class="visuallyhidden"> opens in a new window</span>.</a></li>
<li class="fragment">Do the right thing.</li>
</ul>
<aside class="notes">
<p>Useful stats from the Census Bureau:</p>
<ul>
<li>54 million people have a disability--19 percent of the civilian noninstitutionalized population. This increases with age:
<ul>
<li>5 percent of children 5 to 17 have disabilities.</li>
<li>10 percent of people 18 to 64 have disabilities.</li>
<li>38 percent of adults 65 and older have disabilities.</li>
</ul>
</li>
<li>1.8 million people 15 and older are unable to see printed words.</li>
<li>1 million people 15 and older are unable to hear conversations.</li>
<li>2.5 million have difficulty having their speech understood.</li>
<li>16.1 million have limitations in cognitive functioning or who have a mental or emotional illness.</li>
</ul>
<p>Legal issues: Some sites, like Target, have been sued under the Americans with Disabilities Act (ADA)</p>
</aside>
</section>
<section>
<h2>Accessibility is for everyone!</h2>
<img src="img/curbcut.jpg" alt="Curb cut on sidewalk" />
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/firelizard5/8479806007/">Sylvia Pellicore</a> <a href="http://creativecommons.org/licenses/by/2.0/">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
<aside class="notes">
<p>Ask if people recognize curb cut, then point out that while wheelchairs use them, so do strollers, people with luggage, etc. Mention how accessibility can help the non-disabled as well.</p>
</aside>
</section>
<section>
<h2>Benefits of Accessibility</h2>
<ul>
<li>Curb cuts were designed for wheelchairs, but others use them. Similarly, accessibility features end up helping everyone.</li>
<li>Many times, good design practices create accessibility as a side effect.</li>
<li>Accessibility features, like good alt text, can improve your search engine placement.</li>
</ul>
</section>
<section>
<h2>What are barriers to access?</h2>
<img src="img/barrier.jpg" alt="Traffic barriers"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/apoptotic/4299922931/" target ="_blank">sciencesque<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc-sa/2.0/" target = "_blank">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
<aside class="notes">
<p>This is a good place to pause and ask students to come up with potential types of disability that can affect web use.</p>
</aside>
</section>
<section>
<h2>Types of Disability</h2>
<ul>
<li class="fragment">Visual disabilities: blind or low-sight, color blind</li>
<li class="fragment">Hearing disabilities: deaf or hard-of-hearing</li>
<li class="fragment">Physical disabilities: MS, paraplegic/quadriplegic, epilepsy</li>
<li class="fragment">Cognitive disabilities: dyslexia, low literacy, learning disabilities</li>
</ul>
</section>
<!-- How To-->
<section>
<h2>Accessibility is a continuum, not a checkbox</h2>
<img src="img/checkmark.jpg" alt="Checkmark with word 'chk' on blackboard"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/mattcarman/1573507091/" target ="_blank">Matt Carman<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc-nd/2.0/" target ="_blank">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
<aside class="notes">
<p>Accessibility checkers can help, but they are not a full subsititute for manual testing.</p>
<p>You don't have to be perfect to be helping. No site will be perfectly accessible for everyone in the world.</p>
</aside>
</section>
<!-- Working with Screen readers-->
<section>
<h2>Visual disabilities</h2>
<img src="img/canes.jpg" alt="Blind pedestrians with white canes"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/brailleinstitute/5169573221/" target ="_blank">Braille Institute<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc-nd/2.0/" target ="_blank">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h2>What assitive technology do people use?</h2>
<ul>
<li>Browser zoom</li>
<li>Screen magnification</li>
<li>High contrast displays</li>
<li>Screen readers</li>
</ul>
<aside class="notes">Important points:
<ul>
<li>Low vision is very common</li>
<li>Even people who are legally blind may have some residual vision</li>
<li>Screen readers are also useful for people with print disabilities, like dyslexia</li>
</ul>
</aside>
</section>
<section>
<h2>Demo</h2>
<aside class="notes">
<p>Choose a site with a complex nav menu, and show how long it takes to get through with a screen reader. I used CNN.com and NVDA for this demo, but any common screen reader will work.</p>
</aside>
</section>
<section>
<h2>Let's try it</h2>
<p><a href="http://webaim.org/simulations/screenreader-sim.htm" target ="_blank">Screen reader simulation<span class="visuallyhidden"> opens in a new window</span></a></p>
<p>http://bit.ly/p3JmJ2</p>
<aside class="notes">
<p>Have students try the screenreader demo at http://webaim.org/simulations/screenreader-sim.htm. (With headphones!) You may have to help people install the Shockwave plugin. Time limit to ten minutes, and cut it short if students seem bored or frustrated.</p>
<p>If available, demo VoiceOver on the iPhone/iPad or Talkback on Android.</p>
</aside>
</section>
<!-- Alternate text -->
<section>
<h2>Provide an alternate path</h2>
<img src="img/anotherpath.jpg" alt="Signs pointing to handicap-accessible routes" />
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/lng0004/7093675431/" target ="_blank">Linh H. Nguyen<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc-nd/2.0/" target ="_blank">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h2>Alt text</h2>
<ul>
<li class="fragment">Alternate text describes pictorial content in words.</li>
<li class="fragment">Pay attention to context.</li>
<li class="fragment">Describe the <em>function</em>, not the content.</li>
<li class="fragment">If an image is purely decorative, use <code>alt=""</code> to instruct a screen reader to skip it.</li>
<li class="fragment">Instead of using "longdesc," provide a caption or link. Consider HTML5 <code>figure</code> and <code>figcaption</code>.</li>
</ul>
<pre class="fragment"><code class="html"><img src="location.jpg" alt="brief description">
<figure>
<img src="location.jpg">
<figcaption>brief description</figcaption>
</figure>
</code></pre>
</section>
<section>
<h2>Let's try it</h2>
<p>Provide alt text for the images on your handout.</p>
<aside class="notes">
<p>Print handouts in advance! They are in the repo as kitten-alt-text.pdf</p>
</aside>
</section>
<section>
<h2>Other tips for screen readers</h2>
<ul>
<li class="fragment">Headings skip-nav links and landmark roles give users a way to navigate through a page.</li>
<li class="fragment">Content is more than just visual.</li>
<li class="fragment">External link indicators prevent unexpected page changes.</li>
<li class="fragment">Tables can be hard to navigate, so only use them for tabular data.</li>
<li class="fragment">Many users are switching to touch-screen based readers like <a href="http://www.apple.com/accessibility/iphone/vision.html" target="_blank" title="Link opens in a new window">VoiceOver on iOS<span class="visuallyhidden"> opens in a new window</span></a>.</li>
</ul>
</section>
<!-- Other visual disabilities-->
<section>
<h2>Provide contrast</h2>
<img src="img/contrast.jpg" alt="Crosswalk with contrasting colors"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/antifluor/2074560932/" target="_blank" title="Link opens in a new window">antifluor<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by/2.0/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h2>More on visual disabilities</h2>
<ul>
<li class="fragment">If you use color to indicate something, also use another indicator. For example, underline links on hover or mark a required field with an asterisk.</li>
<li class="fragment">Red/green color blindness is the most common, so avoid green on red.</li>
<li class="fragment">Include color names in product descriptions and show examples (<a href="http://24ways.org/2012/colour-accessibility/" target="_blank" title="Link opens in a new window">article<span class="visuallyhidden"> opens in a new window</span></a>)</li>
<li class="fragment">Have a <em>minimum</em> of contrast ratio of 4.5:1 for normal text and 3:1 for large text. (<a href="http://webaim.org/resources/contrastchecker/" target="_blank" title="Link opens in a new window">Checker<span class="visuallyhidden"> opens in a new window</span></a>)</li>
<li class="fragment">Try zooming in on your designs, to see how they look when enlarged. It is a good idea to use ems and percentages instead of pixels when you can.</li>
</ul>
</section>
<!-- Hearing disabilities-->
<section>
<h3>Provide good captions</h3>
<img src="img/in_ur_reality.png" alt="Stick figure attaching captions to cats. Dialog- Man: Oh hi; I'm here from the internet; Man 2: What are you doing!?; Man: Gluing captions to your cats."/>
<p class="credit">Credit: <a href="http://xkcd.com/262/" target="_blank" title="Link opens in a new window">Randall Munroe<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc/2.5/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h3>No, automatic captions don't count</h3>
<img src="img/bad-captions.png" alt="YouTube video with nonsense captions: Look at your help literally now you can link your data from hell"/>
<p class="credit">Credit: Sylvia Pellicore, from YouTube</p>
<aside class="notes">
<p>The original audio in that clip was "link your data from <strong>health</strong> care apps"</p>
</aside>
</section>
<section>
<h3>Hearing Disabilities</h3>
<ul>
<li class="fragment">Most deaf or hard-of-hearing people have limited difficulty with web accessibility.</li>
<li class="fragment">Provide captions or transcripts for multimedia elements.</li>
<li class="fragment">Don't rely on sounds to convey information, like an "alert" noise. Even hearing users often have their computers muted.</li>
<li class="fragment">Be especially careful if your site targets older users, as hearing loss is common.</li>
</ul>
<aside class="notes">
<p>Paid captioning services are relatively inexpensive, about $1.50 to $2.50 a minute.</p>
</aside>
</section>
<!-- Physical disabilities-->
<section>
<h3>Lose the Mouse</h3>
<img src="img/mouse.jpg" alt="Cat steals mouse" />
<p class="credit">Photo credit: <a href="http://ipkitten.blogspot.com/2013/07/the-patent-legacy-of-computer-mouse.html" target="_blank" title="Link opens in a new window">The IP Kat<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h2>Demo</h2>
<aside class="notes">
<p><a href="https://www.youtube.com/watch?v=p83wLuq3USA" target="_blank">YouTube video on eye-tracking software</a></p>
<p><a href="http://codecanyon.net/item/subscribe-popup/full_screen_preview/2421232">Popup sign up</a></p>
</aside>
</section>
<section>
<h3>Physical Disabilities</h3>
<ul>
<li class="fragment">Many users with limited mobility interact with the screen via keyboard.</li>
<li class="fragment">Other users use a mouse, but have trouble with fine motor control.</li>
<li class="fragment">Make clickable elements large, and put space between them.</li>
<li class="fragment">Avoid clickable page elements that move.</li>
<li class="fragment">Animations with rapid flickers are not only annoying, they can trigger epileptic seizures.</li>
<li class="fragment">These guidelines also help children and touchscreen users!</li>
</ul>
</section>
<!-- Cognitive disabilities-->
<section>
<h3>Don't overwhelm</h3>
<img src="img/toomanysigns.jpg" alt="Sign post with multiple signs"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/thomashawk/2402598275/" target="_blank" title="Link opens in a new window">Thomas Hawk<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc/2.0/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h3>Provide plenty of time</h3>
<img src="img/clock.jpg" alt="Alarm clock"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/beth19/4721798240/" target="_blank" title="Link opens in a new window">Bethan<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc-nd/2.0/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h3>CAPTCHAs don't just catch robots</h3>
<img src="img/confusedrobot.jpg" alt="Confused robot"/>
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/baboon/3946055/" target="_blank" title="Link opens in a new window">baboon<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-nc/2.0/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h3>Dealing with cognitive disabilities</h3>
<ul>
<li class="fragment">This is a less-researched area of web accessibility. Here is a <a href="http://jkg3.com/Journal/cognitive-accessibility-101-part-1-what-is-cognitive-accessibility">Cognitive 101</a>.</li>
<li class="fragment">Minimize cognitive load--don't overwhelm the user.</li>
<li class="fragment">Use common icons to mark important tasks and consider text labels.</li>
<li class="fragment">If you have timed content (forms, image galleries, etc.) provide controls or allow users to extend time.</li>
<li class="fragment">CAPTCHAs aren't blind-friendly, are very difficult for users with learning disabilities like dyslexia, and annoy everyone. Consider <a href="http://webaim.org/blog/spam_free_accessible_forms/" target="_blank" title="Link opens in a new window">an alternative method<span class="visuallyhidden"> opens in a new window</span></a>.</li>
</ul>
<img class="fragment" src="img/captcha.png" alt="Screenshot of a Captcha" />
</section>
<!-- Class exercise -->
<section>
<h2>Let's try it</h2>
<p>Visit a site you use frequently. Identify one accessibility feature that is part of the site and one feature you would change.</p>
<aside class="notes">
<p>Students can do this activity alone or in pairs, depending on the size of the class. If people get stuck, recommend:</p>
<ul>
<li>http://www.buzzfeed.com/</li>
<li>http://www.ebay.com/</li>
<li>http://facebook.com</li>
</ul>
<p>Depending on time, you can have each group present on what they found.</p>
</aside>
</section>
<!-- Final slides-->
<section>
<h3>Show your users some love!</h3>
<img src="img/handicappedlove.jpg" alt="Disabled parking symbol with a heart" />
<p class="credit">Photo credit: <a href="http://www.flickr.com/photos/samfelder/115576714/" target="_blank" title="Link opens in a new window">Sam Felder<span class="visuallyhidden"> opens in a new window</span></a> <a href="http://creativecommons.org/licenses/by-sa/2.0/" target="_blank" title="Link opens in a new window">cc<span class="visuallyhidden"> opens in a new window</span></a></p>
</section>
<section>
<h3>Resources</h3>
<ul>
<li><a href="http://webaim.org/resources/designers/" target="_blank" title="Link opens in a new window">Web Accessibility for Designers<span class="visuallyhidden"> opens in a new window</span></a></li>
<li><a href="http://webaim.org/" target="_blank" title="Link opens in a new window">WebAIM (Web Accessibility in Mind)<span class="visuallyhidden"> opens in a new window</span></a></li>
<li><a href="http://www.globalaccessibilityawarenessday.org/" target="_blank" title="Link opens in a new window">Global Accessibility Awareness Day<span class="visuallyhidden"> opens in a new window</span></a></li>
<li><a href="http://a11ywins.tumblr.com" target="_blank" title="Link opens in a new window">Accessibility Wins<span class="visuallyhidden"> opens in a new window</span></a></li>
<li><a href="http://wet-boew.github.io/v4.0-ci/index-en.html" target="_blank" title="Link opens in a new window">Web Experience Toolkit<span class="visuallyhidden"> opens in a new window</span></a></li>
<li><a href="http://www.w3.org/WAI/" target="_blank" title="Link opens in a new window">W3C Web Accessibility Initiative (WAI)<span class="visuallyhidden"> opens in a new window</span></a></li>
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Introduction to Web Accessibility -- Girl Develop It --
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