Can anybody help with an idea on how to set up a system to deliver a timely materials for members in membership site?
For example, let's just say I want to set up a language course site with 25 lessons. Members will get new lessons available (or 'unlocked') on the site one by one automatically on a regular basis. So, members who joined earlier will get more materials than those who joined later. Then after finishing all the lessons, the member will get a test and if they pass it they will automatically get some kind of an e-certificate.
If possible the system should be something utilizing Wordpress and the free plugins.
FYI, I'm planning to set up a non-profit educational site where people with knowledge (teachers) could provide the materials, and people who need knowledge (students) could make use of the provided materials. (Or at least I could set up a tutorial to help others to build such site).
Any input would be greatly appreciated.