1. The strength of Moodle
Moodle is a widely used open source learning management system that is constructed from the start to be modular. That means that most of the available features are designed to operate independently from one another so that some can be switch off without negatively affecting the operation of the whole system. It also means that if you have specific needs not found in the basic system those can be added seamlessly as well without causing conflicts with the standard functions.