Schools to blame for childhood obesity?

I have been doing  a lot of research on my topic and I have found something that I never knew before. Many studies show that students who bring their own lunch from home are more healthy and more nourished than a student who eats school lunches regularly. This is because of the fattening and sugary foods schools provide as school lunches not to mention the overwhelming amount of preservatives used for these lunches. Because of the fattening, and sugary foods, students (mainly younger kids) are becoming increasingly obese. While I was researching on this topic, I ran into a very disturbing fact about school lunches. The meat used in school lunches have been rejected by fast food restaurants two of which are McDonalds and Burger king. The meats were rejected because they did not meat the safety standards of the company. We all know how bad and unhealthy McDonald's meats are, and it is disturbing to know that the meats rejected by McDonalds are found in the hands of students all across the nation.