I'm really sure it's useful or nice to name platforms specific here when you are really talking the strengths/weaknesses of LTI vs other methods for distributing content.
Moodle can handle all use cases here and so it has ultimate flexibility in this regard:
- It can have native content uploaded into it in a number of formats (including standards like IMS CP and SCORM).
- It can publish it's own content (both as individual activities or whole courses) using LTI standards.
- It can consume content published using LTI standards.
- It can consume content using any proprietary method (via plugins).
Obviously a course designer needs to choose among these when building a course.
Before we can talk about strengths/weaknesses of these, though, we need to define better what the OER content is: Is it just single documents? Is it a whole course (multiple resources/activities)? Is it interactive? Is it collaborative? Does it allow grading? I think there could be a nice matrix made of all this.
In general though, some of the disadvantages of LTI-based resources are that:
- They don't work well in offline cases, unless some way to copy/cache them is provided.
- They are generally not customisable/localisable/translatable by the teacher who is using them.
- They increase the possible points of network/server failure that can affect final course experience.
- They can be a little more difficult to set up and understand.
- They have some privacy issues with student data being sent to different servers.
Some of the advantages are:
- LTI resources can be maintained centrally but used equally on multiple LMSes
- LTI resources lend themselves to business models based on subscription.
- LTI resources encourage standardisation (in the content itself as well as the format).