With the second half of the school year underway, it’s likely some students don’t have the same teacher they had in the fall. Mid-year teacher turnover doesn’t occur as frequently as end-of-year turnover, but it’s likely more prevalent than most people think. U.S. teachers leave the profession at higher rates than other countries, but the debate and discussion over teacher attrition – reflected in  research and in the media – focuses on educators exiting the profession before the beginning of…