"We got another reminder recently that when it comes to tracking the performance of public education, it pays to be skeptical about claims of success."

So says the Tribune in yet another editorial attack on Chicago's public schools which includes yet another illogical promotional ad for charter schools.

Trib folks, you can't reject the admittedly dubious claims of CPS officials about the schools overall, yet embrace their even more unreliable internal studies claiming that their charters outperform the neighborhood schools charter students "would probably have attended." CPS's charter reports have been dismissed by researchers, in part because they fail to acknowledge that local charters serve proportionately fewer low-income, special needs, and limited-English speaking students.