Adell Cothorne, DC whistle-blower extraordinaire, offers a warning: Don’t believe so naive as to believe the hype from the District of Columbia public schools about its teacher evaluation system.

Cothorne was there.

She says that the principals were not trained; that school secretaries often did the crucial paperwork.

That the IMPACT system is so complicated that no one, not even its designers, could explain how it works.

That the system continues to lose excellent principals and teachers.

That the evaluation system has no bearing on student achievement.

Cothorne suggests that IMPACT should be applied to central office staff.