It's possible to add several lists of courses to the front page, among them are "List of courses," "List of categories," and "Combo list." These are all useful, but both "List of categories" and "Combo list" are titled "Course categories."
Why it matters
Screen reader users often navigate by page header, and it's impossible to tell from the headers which list they need. This is a non-issue for sighted users, who will focus on the content.
Create a better heading for the combo list.