The second annual Wisconsin school report cards are out — and for the second time, state officials urge caution in the way we interpret them. The Department of Public Instruction says a “value added calculation” required by state law caused major fluctuations from last year in the scores for 162 schools and 24 districts. If there’s a change of more than ten points either way, the D-P-I says statistical issues might be to blame, more than a school’s actual performance. The report did say that 16-hundred-71 schools — met or exceeded the state’s expectations in the last school year, and were given at least three stars in a five star rating system. But 108 public, charter, and private tax funded schools failed to meet expectations, a third of those being in Milwaukee — and another 250 met only a few expectations.