When you mouse over a course-related activity have it show leader/summary SD412
When I mouse over a course activity, display a "tool-tip/infotip/hint" containing the leaders name or the activity summary next to the cursor.

We added more information about lectures and field trip activities to the Course Requirements tab of the Course Details page. Information included title, activity dates, registration open/close dates, availability, and leader.
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Show me a "quick view" of a course activity (lectures and field trips) shown in the "Course Requirements" tab when I click on the activity title. The quick view will have more then the activity summary view, but less than the activity detail view. I will see a link to the full; details, and, if I am registered for the course, I will also see the "Manage Registration" button.
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Gerry Chu commented
This would be helpful as some activity leaders for courses only want their SIG/mentor group to register for that activity, but there is no indication of this on the Manage Registration lightbox.