Since the test should cover the material in question, the teacher should always be teaching 'the test'.
To not do so would be wrong.
Agreed, buy there is covering the material and there is teaching the test. IMHO using standardized tests to determine success is fraught with problems. I know too many students that are brilliant on essay questions but are totally destroyed by the K type. One size does not fit all. We still are not looking at the quality of the material we are only examining the success of the machinist. Poor material makes poor products unless your a politician looking to praise those producing poor starting materials so that you can give them something to vote for you. Obamaphones are a good example. A machinist polishing up the turd he was provided as starting material, to make it look like steel, is only carrying on the process started by others. The machinist in many if not most cases can’t transmute lead into gold. A good alloy is possible if you are given good metals.