I have 2500 dives at my current DZ. I have no idea what the east side is. I could work it out thinking of where the sun sets, but that's cos I've watched the sun set there for 10 years.
I call my students by their names. I make around a dollar a second out of them. The very least I can do is remember their names.
After all, I just said "Hey {Students name}! Are you ready to skydive? Come to the door with me." about 50 seconds before their canopy opens.
(And I have a CRAP memory.)
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Wow. 2500 skydives, you're an instructor and you don't know east west north south at your home dropzone. Thats scary.