The Economist:

Many states emphasise abstract concepts rather than history itself. In Delaware, for example, pupils “will not be expected to recall any specific event or person in history”. Other states teach children about early American history only once, when they are 11. Yet other states show scars from the culture wars. A steady, leftward lean has been followed by a violent lurch to the right. Standards for Texas, passed last year, urge pupils to question the separation of church and state and “evaluate efforts by global organisations to undermine US sovereignty through the use of treaties”.
Some states fare better. South Carolina has set impressive standards–for example, urging teachers to explain that colonists did not protest against taxation simply because taxes were too high. Other states, Mr Finn argues, would do well to follow South Carolina’s example. “Twenty-first century skills” may help pupils become better workers; learning history makes them better citizens.

Related: The State of State U.S. History Standards 2011: Wisconsin = F.