LearnDash is the most popular LMS (learning management system) plugin for WordPress: multi-level courses; Sell ​​courses; Certificates and points; Extended survey; Expire Access; Job management; Dynamic forums; Lesson timers; Flexible prerequisites; User profiles;

Demo: https://demo.learndash.com/

LearnDash comes with more than a few levels that make it easy to create courses, lessons, topics, quizzes and categories. It has a progressive playback functionality so you can program course content for the duration of the entire course.

You can assign users and then approve or comment on them. It also comes with a quiz and testing manager tool with multiple questions. You can easily define the prerequisites so that each student can move on to the next class.

There are several payment gateways available to accept payments from PayPal, Stripes, 2Checkout, etc. It also fits nicely with bbPress.

Addons:

Elementor PRO is a WordPress page builder with no limits. For a builder that allows you to create a professional design and which is equipped with advanced functionality that has not yet been seen on WordPress.

Demo: https://elementor.com/pro/

Elementor PRO is a drag and drop page builder that allows you to create responsive page layouts using a live editing interface so you can see your changes immediately. Advanced features such as parallax scrolling, wide layout background images, advanced buttons, custom titles, etc. are included.

Elementor's biggest advantage lies in its speed and ease of use.

Addons for Elementor:

HappyAddons Pro is a set of slick, powerful widgets that work seamlessly with the Elementor page builder . Its trendy appearance with detail customization features allows you to instantly create extraordinary designs.

Presets. Choose from any of the pre-made designs to customize and compare different widget appearances. Just click on presets from the drop-down menu.

Cross-domain copy and paste. Working on multiple sites? Easily copy something from one site and paste it on others to get rid of repetitive work. Cool, isn't it?

Section attachment.Don't you want to use multiple sections at the same time in Elementor? Now it's possible with HappyAddons. Create as many sections as you want, organize items more efficiently.

Copy layout. It is often complained that it is impossible to make an accurate demo design on the site. Well, it won't happen again. With LiveCopy you can now copy any design from the HappyAddons demo site to your site. The magic is that you can copy from the frontend to the Elementor edit panel. Isn't it amazing?

Floating animation effect.HappyAddons provides you with several powerful features in the built-in motion effects section, which helps you animate and rotate objects in their x-axis, y-axis and z-axis like never before, and offers wonderful effects to help your websites stand out from others.

Import template. Happy Elementor Addons comes with a unique template import feature right from the Elementor editing panel. Initially, there are over 400 ready-made unique blocks / sections.

Unique icon library.Elementor provides users with 1500 great icons. But these are mostly icons. HappyAddons includes over 500 line icons by default for all users. Since the line icon trend is very popular and useful right now, we have added this unique icon pack to create an aesthetic design for your website.

Excellent performance. Get more control over your website speed with on-demand download. Turn widgets on or off as you wish. HappyAddons is carefully programmed to keep the site fast and reliable.

Global extension for all widgets.This is a great addition for elementor. Currently, several widgets have the ability to enter a background color or an image. But there is no option to use the background color of the overlay. HappyAddons provides a global background overlay for all widgets, including Elementor and all third party widgets. Happy Elementor Addons Pro