Dear students,
you can learn many things here in this plugin. You can learn shortcode in this. Like how to create a shortcode. And very importantly how remember the shortcode in the button and put in the editor in real time perpose. Nevertheless, you can leran a highly configured a custom post type. Actually how to activate a custom post in php class. If you know a little bit about object oriented features of php. I have applied the magic class __contruct in this plugin. It is a great chance to learn about the magic method of php here in this plugin. Another great things you can learn in this, is about how to add the sttings button in the plugin page. And more about how to add another in button just near the view plugin site button.
Thanks