What is Meant by Inner and Outer Meditation?

I am attending a class in Vipassana meditation. It's a series of three courses. The second course is almost over. The third course starts May 5. The instructor says the third course will teach "Inner meditation" and "Outer meditation". He won't say what that means yet. The instructor told me he learned meditation from taking the Sarah Powers course. I noticed you have a video called 'Insight Yoga with Sarah Powers". A reviewer on Amazon says you explain "Inner meditation" and "Outer meditation" Can you give me at least a brief explanation of what that means as I am trying to decide whether or not I want to move on with the next course