
Paul,
We also record educational content and it looks like we use the ATEM in a similar way.
We created a macro that brings up either a solid color or a graphic from the media pool for the editor to easily spot where a take ends/begins. We usually go for the last take.
Now, if we do 3 takes and the 2nd take is the best one, we need to communicate that to the editor.
However, you could have graphics in your media pools stating which take was the good one (ie "Use Take 2") that you would pull up at the end of your recording.
Hopefully this gives you some ideas,