Groundbreaking research from the University of New Hampshire:
Parental Involvement Strongly Impacts Student Achievement
But HOW does it impact achievement, you ask? Well:
"Researchers... found that parental involvement has a strong, positive effect on student achievement." (italics mine)
Seriously, though, this part is kind of interesting:
"Parents seemed particularly interested in the academic achievements of their daughters. The researchers found parents spent more time talking to their daughters about their schoolwork during dinnertime discussions"...possibly because girls are more communicative, the researchers said.
...And one from the Archives of General Psychiatry that isn't grossly obvious, but was strongly suspected:
Long-Term Cannabis Users May Have Structural Brain Abnormalities
The amygdala (fear and aggression) and hippocampus (emotion and memory) tended to be smaller with heavy cannabis users, the study found.
So smoking pot might, say, make a person paranoid? And/or forgetful?
I guess Hollywood gets some things right, after all.