You may well have come across SCORM resources and not realized it. Commercial content producers are providing online resources and activities as SCORM objects. For example, the very popular—and free—Fling the Teacher from ContentGenerator.net allows you to export the Fling the Teacher game in SCORM format. The idea is that the SCORM content will work regardless of which VLE you happen to be using. So, what is SCORM?
SCORM actually stands for Shareable Content Object Reference Model, and it's a technical standard telling authors how their content should be structured so that VLEs can display it without any hassle. The great thing is that the standard also describes how a student's progress through the activities and quiz results can be published to the VLE. This means that Moodle can remember how far a student has progressed, and the results of any tests built into a SCORM object can be included in the course grade book.