i ran out of bud 4 days ago and i sleep 2 hours less a night and eat less...But im a huuge pot head who works hard. so when i run out i feel alot less tired and feel somewhat motivated to do something productive. I think its just me wanting to keep busy and not think about weed, but im headed in the other direction on the lazy part..
so i guess what im saying is it makes me physically lazy, and i feel completly ok sitting there and watching a movie rather than going outside to do something.
As far as schoolwork its about keeping at it while learning, not so much physical but mental work. IMO weed would keep me interested and keep a smile on my face the whole time. i would just have to take notes because i tend to forget things.
I also dont think it kills brain cells, we have thc receptors in our brains for a reason.