Charter schools do NOT get better NAEP test results than regular public schools

It is not easy to find comparisons between charter schools and regular public schools, partly because the charter schools are not required to be nearly as transparent or accountable as regular public schools. (Not in their finances, nor in requests for public records, nor for student or teacher disciplinary data, and much more.) At the state or district level, it has in the past been hard or impossible to find comparative data on the NAEP (National Assessment of Educational Progress).

We all have heard the propaganda that charter and voucher schools are so much better than regular public schools, because they supposedly get superior test scores and aren’t under the thumb of  those imaginary ‘teacher union thugs’.

However, NCES has released results where they actually do this comparison. Guess what: there is next to no difference between the scores of all US charter schools on the NAEP in both reading and math at either the 4th grade or 8th grade level! In fact, at the 12th grade, regular public schools seem to outscore the charter schools by a significant margin.

Take a look at the two graphs below, which I copied and pasted from the NCES website. The only change I made was to paint orange for the bar representing the charter schools. Note that there is no data available for private schools as a whole.

public vs charter vs catholic, naep, math

If you aren’t good at reading graphs, the one above says that on a 500-point scale, in 2017 (which was the last year for which we have results), at the 4th grade, regular public school students scored an average of 239 points in math, three points higher than charter school students (probably not a significant difference). At the 8th grade level, the two groups scored identically: 282 points. At the 12th grade, in 2015, regular public school students outscored charter school students by a score of 150 to 133 on a 300-point scale (I suspect that difference IS statistically significant). We have no results from private schools, but Catholic schools do have higher scores than the public or charter schools.

The next graph is for reading. At the 4th grade, charter school students in 2017 outscored regular public school students by a totally-insignificant 1 point (222 to 221 on a 500 point scale) and the same thing happened at the 8th grade level (266 to 265 on a 500 point scale). However, at the 12th grade, the regular public school students outscore their charter school counterparts by a score of 285 to 269, which I bet is significant.

charter vs public vs catholic, naep, reading, 2017

 

 

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