With the help of our friends at Public Impact - who did the data analysis represented by the graphs below ? today we continue our series on Ohio school performance data with a look at student performance in Ohio's ?Big 8? districts (Akron, Canton, Cincinnati, Cleveland, Columbus, Dayton, Toledo, and Youngstown) and charter schools.
First let's look at raw achievement of students attending Ohio's Big 8 district schools, and bricks-and-mortar charters in the Big 8. (We'll look at e-school charter performance later in the series.) Achievement is measured by a ?Performance Index,? a weighted average of student achievement in all tested subjects in grades 3-8, and which ranges from 1-120 (100 is the state goal).
Chart 1 compares the distribution of PI scores of bricks-and-mortar charters in the Big 8 districts to the distribution for traditional schools in those districts. There are two things to look for in the chart below. First, the higher the point on the graph, the more schools with that PI score. Second, the further to the right the curve, the higher the PI score.
Not surprisingly, charter schools are overrepresented at both the upper and lower tails of the performance scale.? A greater percentage of charter schools than district schools have PI scores of 100 or better; 8.4 percent of charters are in this high-flying category compared to 5.6 percent of district schools.? Unfortunately, the same is true for schools with PI scores of 60 or below. While only 4 percent...