As a student, I'd like to know the difficulty/time required for each lesson

[elipousson]

Establishing clear expectations are important to keep students engaged. Including information about the intended audience, the anticipated difficulty or time required for each lesson or activity may be helpful.

Here is one way to calculate reading time using a Liquid template:

<span class="reading-time" title="Estimated read time">
  {% assign words = content | number_of_words %}
  {% if words < 360 %}
    1 min
  {% else %}
    {{ words | divided_by:180 }} mins
  {% endif %}
</span>

If we wanted to include this in the course page template, we'd need to add:

{% include read_time.html %}