In addition to analyzing the most used words, you can create your own Tag Cloud, with the words that you think should be mentioned more in your course.

When creating the generic cloud comparison and your own, you can see the deviation or the approximation that there are to the themes that you propose.

NeuroK gives you the list of the most used words in the course, so you can select the one you want, or you can add new words to create your own analytic.