Yesterday, Jamie wrote about both the academic achievement and progress of students in Ohio's urban public schools.?? Today's analysis marries these two performance metrics together.
Ohio, like most states, issues data on both schools' annual achievement (a snapshot of performance) and academic growth over time. Ideally, schools will have high proportions of their students achieving at (or above) grade level and making measurable growth or progress in test scores over the course of the school year.
Chart 1 plots Ohio's Big 8 charter and district schools by both achievement and growth. Each square represents an elementary or middle school (high schools do not receive a value-added ??? growth -- score in Ohio). The upper-right section of the matrix is the ideal: high achievement and high growth. The vertical placement of each square represents a school's achievement; the higher a square, the higher the achievement. The horizontal location of each square represents a school's value-added category only (that is, a square on the left side of a box does not necessarily have lower value-added than one on the right; they are both in the same value added category).
Chart 1: Urban charter schools vs. Ohio 8 district schools, Performance Index growth in reading and math (2010-11)
Source: Ohio interactive local report card
Overall, it doesn't appear either type of school has the performance advantage.?? While charters have an...