Good question. Yep. LSMILE is an acronym that stands for:
In Oregon, we generally try to keep the acronyms to a minimum. But this one is a good mnemonic to help students remember the correct procedure on entering the vehicle, before putting the vehicle in motion.
That said, LSMILE isn't perfect. At Portland Community College, we use a lot of Priuses for driver ed. Like many newer vehicles, mirror adjustment controls in a Prius are electric. In order to adjust the mirrors, the driver has to start the engine.
Also, LSMILE omits putting the vehicle into gear (whether Drive or Reverse). We teach that the driver puts the vehicle into gear before releasing the emergency brake.