Two tools that can be used to aggregate and present learning material are WizIQ and Udemy.

WizIQ

WizIQ is a learning management system that features a virtual classroom, course builder, tests and assessments, reports and analytics as well as mobile learning.  It offers many solutions and is very accessible to users with special needs, it is easy to navigate and you do not have to know anything about design, software or programming.  There is a cost, however there is also a free version.  The cost is based on the number of users and the tools used.  It is very professional looking.

Udemy

Udemy is more of a content management that allows users to build courses as well as monetize the courses.  It offers many solutions and is very accessible to users with special needs, it is easy to navigate and you do not have to know anything about design, software or programming.  There is no cost unless you sell your course and then there is a percentage of the sales.  It is very professional looking.  The main drawback is if you are using their site, you have to follow their presentation guidelines which ensures that your course is consistent with their values of quality.