A new student test in Madison schools that could help gauge the effectiveness of the school district?s achievement gap plan suggests an average student?s knowledge grew at or slightly below the rate of their national peers in math and reading and ended the year about a half-grade level behind….One advantage of MAP is it allows schools to closely track the growth of students over a school year, said Bradley Carl, a researcher at the Value-Added Research Center at UW-Madison. While attainment levels are important for setting high expectations for students and schools, growth more accurately reflects the impact of a school, program or teacher.