Module use report
The Module use report displays how many courses use each module. A second page shows which courses use a specific module.
Copy the moduleuse folder into admin/report/
Users with suitable privileges will see the 'Module use' link in the reports section of the 'Site Administration' block. Clicking on this link displays the first page of the report, listing all installed modules and the numbers of instances and courses they are used in. Clicking on the numbers leads to the second page where the courses using an individual module are listed, with the number of instances in each course.