Classes are still based strictly on age groups, which is hard for children who differ sharply from the average.

ECONOMIST: Home education

America may be happy to differ sharply from the world's other democracies on some moral and ethical issues, and this often irritates its closest friends.

ECONOMIST: An end to killing kids | The

Despite centuries of fusion with Aryan (Hindu) culture and religion, it has retained an independent civilization whose languages, particularly Tamil, differ sharply from those of the north.

CNN: Center Cut

Unsurprisingly, Mr. Freeman has views about Middle East policy that differ rather sharply from those held by supporters of the state of Israel.

WSJ: Gabriel Schoenfeld Says Barack Obama's Pick to Head the National Intelligence Council, Charles 'Chas' Freeman Jr., Is a Controversial Choice

Technology ecosystems are complex matrices of cross-wired businesses, and the major examples sharply differ from each other.

ENGADGET: Editorial: Microsoft is singing the right tune with some wrong notes