I've mentioned several schooling options in the past in Buenos Aires - from private, traditional American and British English schools to public schools to private bi-lingual schools such as the French Lycee.
Other options for families looking for the non-traditional would be either the Waldorf school or homeschooling.
The Waldorf school in Martinez would be a great idea for someone whose kids already have some Spanish language skills as most classes are taught in Spanish. I have a good friend who has had her kids at the Waldorf school in Martinez for two years now and loves it. She thinks that it has been as great as if not better in many ways than their last Waldorf school in California.
The other possibility, particularly for someone who doesn't want to go through the headache of getting all the papers for their child to go to school is to homeschool. There is a great forum Homeschool World Forum that is helpful if you're considering homeschooling overseas.
Any comments about your experiences with Waldorf or homeschooling in Argentina please be sure to contact me or post your comments for all to hear!
Here are a couple of other useful sites/forums/groups as well: