Dropping the incidence of malaria in a community
is helping the community develop themselves. It's harder to improve your lot in life when your family is sick with malaria.
There is nothing you can teach for people to avoid malaria at night - mosquitos enter the house and bite you.
Importantly, consider the costs involved: $3 protects 2 people for 4 years. Can you think of a "teach them something" intervention that would provide as much good for the same amount of money?