'Well, duh': Dept of Education says better teachers teach better

That’s a good question. Though it seems like a truism, not worthy of a graphic, to say teachers who are better at teaching get better results.

Great teachers make a difference! pic.twitter.com/8oZtQZLp5q

— U.S. Department of Education (@usedgov) July 27, 2014

@usedgov. Well duh!!!

— ❌Tilly ?? (@tillymannn) July 27, 2014

@usedgov
ALL teachers make a difference. Sometimes its an interpersonal relationship that has greatest impact.

— Alan L. Simmons (@AlanLSimmons) July 27, 2014

Sometimes “making a difference” means hindering a student who might otherwise be more successful.

https://twitter.com/twinning_3/status/493402998320529408

What metrics determine how much Department of Education bureaucrats improve teacher or student performance?