thememattic

A plugin that creates custom post type named as Events, Courses, Team and Testimonial. Each of these post types has required minimal meta fields for educational sites. This addon is best to enhance features of educational themes as it is easy to use and highly secure.
<h3>License</h3>
License: GPLv3 
License URI: http://www.gnu.org/licenses/gpl-3.0.html

Education Connect

An essential plugin to increase optimal use of any educational themes.

guzmandrade

Wrapper and admin panel for <a href="https://developer.wordpress.org/reference/functions/delete_metadata/" rel="nofollow ugc">delete_metadata</a>. 
You can select the object type you want to search to delete metadata. Default to <code>post</code>.
WARNING! Use this plugin with caution. It will delete all post meta based on a meta key.

Delete Post Meta

Handy Plugin

Delete Post Meta based on meta key. Wrapper and admin panel for delete_metadata.

Education Connect vs Delete Post Meta