Here's the instructional leadership news that caught TeachBoost's attention this week:

• De Blasio Unveils New Plans for Troubled Schools in New York, from The New York Times

• 50 Great Teachers: Socrates, The Ancient World's Teaching Superstar, from NPR

• Churn: The High Cost of Principal Turnover, from School Leaders Network

• Response: Using Teacher Evaluations 'to Promote Growth', from Larry Ferlazzo via EdWeek Teacher Blogs

• Will Obama’s new regulations on teacher preparation get it right — or wrong?, fromThe Washington Post

• Take It From the Top: Making Superintendents 'Future Ready', from Mary Jo Madda viaEdSurge