Managers are responsible for setting workplace policies under which teachers can succeed. Managers are responsible for negotiating contracts that create the conditions under which teachers can succeed.

You can have great teachers, but if you don't have a good principal, you won't have a good school.

The biggest barrier we've seen to student progress is this: School policies and practices often prevent good teachers from doing great work and even dissuade some talented Americans from entering the profession. This needs to change.

The inability to delegate is one of the biggest problems I see with managers at all levels.

If you have poor management that's not doing the right job, you end up with unions filling the void and... page after page of work rules and thicker and thicker contracts.

Time is the most valuable thing you have - and I'm not just talking about the minutes for which you're paid.