Frankie Jarrett

Did you find this plugin helpful? Please consider <a href="https://wordpress.org/support/view/plugin-reviews/prevent-concurrent-logins" rel="ugc">leaving a 5-star review</a>.
<ul>
<li>Deters members/subscribers from sharing their accounts with others</li>
<li>Hardens security by destoying old sessions automatically</li>
<li>Prompts old sessions to login again if they want to continue</li>
<li>Ideal for membership sites and web applications</li>
</ul>
Important: If you plan to network-activate this plugin on a multisite network, please install the <a href="https://wordpress.org/plugins/proper-network-activation/" rel="ugc">Proper Network Activation</a> plugin beforehand.
Development of this plugin is done <a href="https://github.com/fjarrett/prevent-concurrent-logins" rel="nofollow ugc">on GitHub</a>. Pull requests welcome. Please see <a href="https://github.com/fjarrett/prevent-concurrent-logins/issues" rel="nofollow ugc">issues reported</a> there before going to the plugin forum.

Prevent Concurrent Logins

Prevents users from staying logged into the same account from multiple places.

Open-DSI

Courses will have a new tag to set their Degree of Difficulty. You can choose between 3 predefined options: Beginner, Intermediate and Advanced. 
You can add, edit or remove your own degrees of difficulty by going to “Courses > Degrees of Difficulty” from the menu.
Upload and display an image (or icons, pictograms) for your degree of difficulty (thanks to John James Jacoby and his <a href="https://wordpress.org/plugins/wp-term-images/" rel="ugc">WP Term Images</a> plugin!).
Degrees of Difficulty can be displayed by your theme using the <code>dds_get_sensei_course_degrees_of_difficulty()</code> function.

Degree of Difficulty for Sensei

Sensei LMS add-on to set and display the degree of difficulty of a course.

Prevent Concurrent Logins vs Degree of Difficulty for Sensei