What is accessibility? Why should my website be accessible? Who is the W3C and why are they relevant? How does accessibility relate to government and business websites? We answer all of these questions and more in this module.

Audio, Video and Multimedia refers to content presented via sound, animations or video, or any combination of the three. Most websites will feature some form of media such as YouTube or Vimeo videos, advertisements or audio streaming. Unless you think through the accessibility of your media you're content will present significant barriers to people with disabilities such as:

• Visual impairments (Blindness, low vision and colour blindness)Hearing impairments (Deaf or hard of hearing)•
• Photo sensitive epilepsy
• Cognitive/ learning disabilities
• ADD (Attention deficit disorder)
• Dyslexia

Don't ignore these people. In this module we show you how to address multimedia accessibility.

Despite the abundant use of colour, there are a significant number of people who cannot perceive colour (also known as Colour Blindness). According to the Vision Eye Institute, an estimated 8% of males and 0.4% of females suffer some form of colour blindness.

In this module we discuss the use of colour, and how to test for colour contast minimum and acheive a visual which is inclusive of even those with colour blindness.

In this module we discuss how assistive technology users interact with online forms. It's important to remember that accessible, properly designed and well organised online forms benefit every user, including those with disabilities, novice web users and users on mobile devices.

The use of images on websites not only enhances the aesthetic appeal but is also an effective and quick means of conveying information. The term 'Images' is self-explanatory, however 'Non Text elements' is a broader term and is generally used to refer to:

• Images
• Graphical representations, e.g. images of graphs or tables
• Infographics
• Image map regions
• Animations
• Applets and Programmatic objects
• Graphical buttons
• Sounds
• Audio Tracks (e.g. notification sounds)
• Video

In this module we look at how we make images and non-text elements accessible.

Text is text right? Anyone can read it and make sense of it easily. Not quite...

In this module, we will take a broad look at text, its applications and its presentation with regards to Web accessibility. We'll dive deep into providing structure and emphasis using the correct HTML tags.

Tables are often an after thought for a developer, a quick and easy way to ensure data is displayed in a uniform manner. When discussing accessibility issues for tables, it's important to understand how assistive technologies interact with tables.

In this module we look at the various options a developer has at their disposal and when the correct time and place is to use each of these.

Websites will usually have multiple interlinked pages and sections, which in turn creates a complex environment to navigate and can even be daunting sometimes to sighted users, let alone those using accessibility tools such as screen readers.

In this module we look at how to acheive consistency and apply a meaningful sequence to your navigation structure.

The increasingly dynamic nature of websites has presented new accessibility challenges. The dynamic changes are sometimes visual and may introduce problems for visually impaired users. Assistive technologies also access content in a linear fashion, typically moving through the HTML of the page, so dynamic updates to content that the users had already passed would be indeterminable. Similarly, changes to content they had not yet reached would also go unnoticed.

So, how do deal with this and what technologies are available to help? In this module we look into these questions and more.

Authoring tools come in many types and can be applied in a myriad of ways, from large enterprise web content management system to tiny microblogging apps. Examples of authoring tools include:

• Web content authoring tools such as Web Content Management Systems (CMS)
• Software development tools for scripts, applications etc
• Tools used to update and manage social media content (e.g. Social networks and blogs)
• Web page editors such as WYSIWYG (What You See Is What You Get) editors
• Non text media editing tools (video, audio or image editing tools)

While authoring tools have become an essential web content management tool, they can also present an assortment of accessibility problems.In this module we dive into this topic.