David Ginsburg's uncoachable teacher. "Capability usually isn't an issue, since most teachers have the potential to be effective. Yet no matter how much potential teachers have, few of them will reach their potential without being open to critical feedback. In other words, they must be coachable.

And a reliable indicator of coachability is how teachers respond when they're struggling. Do they blame their struggles on factors beyond their control such as poverty, parents, or the principal? Or do they take ownership of their struggles? To illustrate, let's look at a video, starting with this clip of a staged (awesome acting!) coaching conference David discovered on Michael Goldstein's blog, Starting an Ed School: