Tracking progress based on number of slides
I'm trying to figure out how I could track a students progress based on the number of slides visited in a scene, without knowing how many slides may be in that particular scene.
My thinking is:
Progress needs to be calculated as a percentage of the total number of slides in the scene.
So how would I get the number of slides, which slides have been visited, and finally display the progress on screen?
Any help would be gratefully received!