Also think about it if schools are spending resources on feeding the children it takes money away from resouces towards teaching children.
taking from article
There are a variety of explanations for why schools’ test scores are correlated with F/R meal percentage:
?More affluent families have more free time to support their kids in school
?Income is correlated with education, so higher income parents tend to have higher educations and tend to be more supportive of their children’s educations
?Income is correlated with education, so higher income parents tend to prioritize education higher for the children
?Less affluent parents are more likely to work two jobs or otherwise be less available to help their children with homework, volunteer in their classrooms, and so on.
?Income is also correlated with age, so parents in more affluent schools are likely to be older, on average, than parents in less affluent schools, which gives them a better ability to support their children academically
?Children in more affluent schools have a peer group more supportive of education in general, which helps pull up test scores for all students in that peer group
?More affluent schools have higher levels of financial support from their PTAs for support services like classroom aids, extra computers, and so on
http://www.bellevueschools.net/income-and-test-scores-in-the-bellevue-schools/