I recommend doing it over at least a month. I can't remember what it's called, but I recollect that learning requires a certain amount of time to be "processed" by your brain and internalised to become part of your skill set.
Do all your navs in one week and a month or so later you may have forgotten what you learned.
I still replay in my mind every flight I've done and find that I learn something new each time
- Like how wonderful it is to have a good autopilot and a GPS
- And NOT to keep misjudging distances when on approach to short and narrow strips
