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Students Affected: 
Principles: Follow Web Standards, Separate Presentation from Content
Web browsers expect to receive Web pages written according to the rules of 
HTML. HTML that observes these rules is said to be "valid." Valid HTML is an important step toward developing an accessible Web page.
If You Do It Wrong: Your Web pages may display unpredictably in some browsers, especially newer browsers and browsers for people with special needs.
If You Do It Right: Your Web pages display well in any standards-compliant browser.
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Even if you use a Web page editor (e.g. Microsoft FrontPage, Netscape Composer, Macromedia Dreamweaver), it is always good to know a little valid HTML. It gives you more flexibility with Web page design and a better understanding of why things don't always work the way you expect them to. Many accessibility techniques require a little knowledge of HTML. One good place to start learning HTML is the WebAIM Basic HTML Tutorial. |
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- Use the most current and valid version of HTML.
- Do not misuse valid HTML tags. For example, <blockquote> should be used to quote a block of text, not to create indented margins. Misusing valid tags can further confuse browsers.
- Test your pages with an HTML Validator before posting them online (see Testing Tips below).
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Microsoft Word allows you to create Web pages quickly and easily, but it also may create invalid HTML. This poses accessibility problems with screen readers and Web browsers other than Internet Explorer. Try using another Web page editor instead. |
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Test the validity of your HTML code with an HTML validator.
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