Headings are important to end users because they add structure and meaning to the content. Additionally, most screen readers and browsers allow users to jump directly to headings. Furthermore, headers also provide visual clues about the importance of content because of the size of the header in relation to the rest of the content. Well designed content always has a strong visual hierarchy; poorly designed content has little to no visual hierarchy and gives few clues about where to focus your attention and/or how the content is organized.


There are six levels of headings that can be used in HTML, header 1 indicating the most important and header 6 the least important, however it extremely rare to use all six levels in use. Here is the list:

Heading 1

Heading 2

Heading 3

Heading 4

Heading 5
Heading 6


In addition to applying the headers properly, it is important to be sure you nest them properly. If the subtitles have the same level of importance, they should have the same header number. See an example below:


World War II (Heading 1 - Lesson Title)

Causes (Heading 2 - Page Title)


Long-Term Causes (Heading 3 - Main Heading)

  • Nationalism (Heading 4 - Subheading)

  • Militarism (Heading 4 - Subheading)

  • Economics (Heading 4 - Subheading)


Short-Term Causes (Heading 3 - Main Heading)

  • Invasion of Poland (Heading 4 - Subheading)

  • Pearl Harbor (Heading 4 - Subheading)



Every page of content within CourseArc already has header 1 and header 2 in place so be sure to always start with header 3 when using the Content block. 

showing headers 1 and 2 in CourseArc