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In return , however , they usually have more teaching flexibility , less paperwork and participate more fully in decision making . At lunch and dinner , it 's fried chicken or barbecue beef , chicken , ribs or pork , with two sides from the steam table . Apparently the former , since amid what has been described by some as a nationwide education crisis created by a lack of certified teachers , one Arizona charter school recently received applications from 200 qualified candidates for fewer than 10 teaching jobs . And on each table , there 's often a small piece of cardboard that looks a bit like a ransom note , scrawled with another list of vegetables and specials of the moment , such as fried chicken livers . His servers followed De Amicis ' lead . Harvard University economics professor Carolyn Hoxby , who has studied the effects of competition on school districts across the country , finds that all schools perform better in areas where there is vigorous competition among public and private schools .