How do Socioeconomic factors affect study habits among high school students?

Many poor people do not have the right equipment to study well -- their homes are crowded and distracting, they don't have good food to fuel their brains, it's hard to get a good night's sleep if you're cold and hungry, and many times poor people have to go to work at a younger age than richer people would. Also, poor people are more concerned with making enough money to live than with getting an education sometimes.