I'm not entirely sure what makes them so complicated. They seem simple enough. Pull in, kid gets out, drive away. Or, if you're picking up - which, granted can be slightly trickier since kids aren't exiting school in the exact order as the cars are lined up - you pull in, wait until your kid hops in, and then drive away. And if the car in front of you drives away -- and this is the tricky part -- you just pull forward (even if you're kid isn't in the car yet). The reason you do this is to make room for the car waiting behind you.
Like I tell you, tricky stuff.
The whole parking your car in the drop off lane thing? Don't get me started. There is no parking and exiting your car in the drop off lane. However, there IS parking and exiting your car in the parking lot. Do it there. Really. You can stay parked there for hours, I swear. You can feel free to saunter over to your BFF and chit chat about book club or whatever it is you're doing over there in the drop off lane blocking traffic flow. I promise. No one will bother you there or silently curse your super expensive dye job and perky, obviously paid for by your much older husband boob job.
Just Pull Forward: because drop off lanes are hard.