A survey of thousands of students in Iowa’s private colleges finds a change in their most common major. Business is now the number-one choice, according to the poll by the Iowa Association of Independent Colleges and Universities. John Hartung, the group’s president,says business was first, education second, and other top finishers include: the biological sciences like social work and psychology. Hartung says education was the most popular major for many years, but business has won out more frequently in recent surveys. He speculates one reason may be the low pay scale for most teachers.Hartung says the survey found there’s a big difference between the initial interest in a major a student shows as an incoming freshmen versus what they actually end up getting a degree in.The association covers 30 private institutions in Iowa and 50-thousand students.