In case you missed it on Friday, DCPS Chancellor Michelle Rhee turned down a potentially sizable performance-based bonus, according to a report from the Post’s Bill Turque. Rhee also turned down a year-end check — which can be as high as ten percent of her $275,000 annual salary — last year. By refusing the money, Rhee definitely earns some political points in a time of tightening budgets. But she also avoids a potentially messy debate…