Despite the best efforts of the Florida legislature to give every possible financial and regulatory break to charter school operators, the charter industry is having many problems.

Charters in Duval County are not doing well at all. The legislators and former Governor Jeb Bush have promised again and again that the move to private control would unleash a new era of excellence and innovation, but it hasn’t happened.

Duval’s charter schools performed worse than the district’s public schools on state tests.

Recently released results from the annual Florida Standards Assessments and from state end-of-course exams reveal that in 17 out of 22 tests on reading, math, science, history and civics, charter schools averaged fewer students passing the tests than those in district schools.

In some tests and subjects, far fewer. The biggest differences were in science.

Nearly three out of four Duval students taking biology last year passed its end-of-course exam, compared to less than half, 48.4 percent, of charter school students. Fifty-two percent of Duval’s fifth-graders passed that grade’s science test, compared to 41 percent of their charter school peers.

In every tested grade except sixth, Duval students’ English language arts passing rates and math passing rates exceeded charters.’

“You can see that our schools are improving at a faster clip,” said Duval Superintendent Nikolai Vitti.

There were exceptions, where charters decisively outperformed district schools.

In sixth grade, 48 percent of charter school students passed math, compared to nearly 40 percent at district schools.

In algebra 1, charter schools passed 53 percent of students, 5 percentage points more than the district’s 48 percent. In Florida, high school students need to pass algebra 1 to graduate.

Also, in geometry, the difference between charter and district schools was about 19 percentage points; nearly 56 percent of charter school students passed compared to 37 percent of district students.

(The comparisons are estimates, because Florida obscures scores in grades with few students to protect their identities. That affects charter schools more than district school data.)

Charter schools are independently operated schools that compete with the district for students as well as state and federal tax dollars. Charter school students take the same tests as students in traditional public schools.

Charter advocates will leap to celebrate the grades and subjects where charters got higher scores than public schools, but it should be remembered that charters (unlike public schools) are free to choose the students they want and free to throw out the students they don’t want. They should be superior across the board, but they are not.

This is one of the few articles I have read that acknowledges that charters “compete with the district for students as well as state and federal tax dollars.” Many people do not realize that charters–even low-performing charters–drain money from the public schools.