JOHN McCAIN and Barack Obama are now poised for the final months of combat. A major challenge for all of us, but for parents and educators especially, is to determine how well prepared each candidate is to help our schools and our children.

It is understandable that economic and national security concerns will be in the forefront of voters' thinking and the media's focus. But the critical educational issues facing the nation must also be addressed.

I am not unbiased. I think that the best that can be said about John McCain's perspective on education is that his powers will be limited by what will probably be a Democratic-dominated Congress.

Beyond that, I think his educational ideas are wrongheaded and potentially destructive. Barack Obama, on the other hand, although not an educational visionary, shows far more promise than most of our political leaders.

All political candidates share the same platitudes in support of excellence, high achievement and accountability. But McCain and Obama are light years apart on how to get there.

McCain, the more conservative candidate, in one respect has the most radical educational agenda. He strongly advocates school choice and has publicly declared his support for a voucher system through which parents would be given a stipend to enable them to place their children in whatever schools they choose.

This would be federally supported, implemented with a degree of flexibility by each state and initially targeted towards the poorest children in the worst schools. 

He believes that "all federal financial support must be predicated on providing parents the ability to move their children, and the dollars associated with them, from failing schools."

Volumes have been written about the dangers of vouchers. It's a bad idea educationally.

Where vouchers have been tried there has (a) been no evidence of improved achievement, (b) the creation of a two-tiered system in which the strongest schools get stronger and the weakest schools deteriorate further. It's a bad idea socially, encouraging further segregation and stratification, with no evidence that it helps low-income children and families.