External tool FAQ
From MoodleDocs
What is the External tool?
The external tool is an activity module supporting LTI (Learning Tools Interoperability). It is similar to SCORM as a standard for educational objects, but instead of being a package of content that is uploaded to Moodle, LTI is a way of integrating the functionality provided by another system into your course.
What version of LTI is supported by the external tool?
In Moodle 2.8 onwards, the external tool supports LTI 2.0.
See also
- External tool (LTI) forum on moodle.org