Web accessibility means that people with disabilities can perceive, understand, navigate, and interact with the web. It is important to ensure equal access and opportunity for all users, including those with visual, auditory, physical, speech, cognitive or neurological disabilities. Key principles of accessible design include providing alternative text for images, using headings for tables, ensuring all forms can be completed and submitted, making links meaningful without surrounding context, captioning media, and allowing users to skip repetitive content. Accessibility should be considered from the beginning of web development and evaluated throughout using tools as well as human review.

1. Web Authoring
Topic 23 –
Web Accessibility

2. Objectives
Students should able to:
1. Explain web accessibility.
2. List the principles of accessible design.

3. Web Accessibility
What is Web Accessibility?
Web accessibility means that people with
disabilities can use the Web.
More specifically, Web accessibility means
that people with disabilities can perceive,
understand, navigate, and interact with the
Web.

4. Web Accessibility
What is disabilities?
Disabilities that affect access to the
Web, including
visual, auditory, physical, speech, cognitive, a
nd neurological disabilities.
Visual
Hearing
Cognitive
Motor

5. Web Accessibility
Why Web Accessibility is Important?
It is essential that the Web be accessible in
order to provide equal access and equal
opportunity to people with disabilities.
An accessible Web can also help people
with disabilities more actively participate
in society.

6. Principles of Accessible Design
List of some key principles of accessible
design:
1. Provide appropriate alternative text
2. Provide headings for data tables
3. Ensure users can complete and submit all
forms
4. Ensure links make sense out of context

7. Principles of Accessible Design
List of some key principles of accessible
design:
5. Caption and/or provide transcripts for
media
6. Allow users to skip repetitive elements on
the page
7. Do not rely on colour alone to convey
meaning

8. Principles of Accessible Design
List of some key principles of accessible
design:
8. Make sure content is clearly written and
easy to read
9. Make JavaScript accessible
10. Design to standards

9. Making Accessible Web Site
Making a Web site accessible can be simple
or complex, depending on many factors such
as the type of content, the size and
complexity of the site, and the development
tools and environment.
Many accessibility features are easily
implemented if they are planned from the
beginning of Web site development or
redesign http://www.w3.org/WAI/impl/

10. Accessibility of a Web Site
When developing or redesigning a
site, evaluating accessibility early and
throughout the development process can
identify accessibility problems early when it is
easier to address them.

11. Accessibility of a Web Site
There are evaluation tools that help with
evaluation.
However, no tool alone can determine if a
site meets accessibility guidelines.
Knowledgeable human evaluation is
required to determine if a site is accessible.
http://www.w3.org/WAI/eval/conformance