On course pages, consider changing "Preview" to a less ambiguous word

Description

A user during an Online Workshop pointed out that the word "Preview" – visible on certain lessons – could be interpreted to mean that you would only get a small portion of the lesson without registering for the course. In fact, when a lesson is set to be previewable by its author, a learner is able to see the entire lesson without needing to register for the whole course.

Step-by-step reproduction instructions

The "Preview" button is visible on any course page with at least one lesson that's been set as "previewable" – such as: Intermediate Theme Developer:
https://learn.wordpress.org/course/intermediate-theme-developer/

Screenshot

Solution

Is there another word or phrase we can use instead?

The workshop participant suggested "View lesson" but I wonder if that might not distinguish previewable lessons enough from lessons that aren't set to be previewable. Other ideas:

• Sample lesson
• Preview full lesson
• Sample lesson without login (but this is very long)

@jonathanbossenger @westnz Any other ideas come to mind?

Start at the Intermediate Theme Developer course page and inspect the Preview button shown for previewable lessons. Review the existing label and the suggested alternatives, then confirm the chosen wording clearly communicates that the entire lesson is available; the issue does not name a source file or test.