Scientists raised on "The Jetsons" and "Astro Boy" have theorized for decades that robots would make the perfect helper and companion. Now a handful of public schools in the U.S. are putting that idea to the test.

This year, robots will be teaching everything from math to vocabulary to nutrition inside classrooms in California and New York, a move the researchers call a first in American education.

The Los Angeles experiment, scheduled to start later this spring, will use a robotic "dragon" to teach first-graders about healthy lifestyle habits. Students will help show the robot how to prepare for a race; the hope is that by sharing tips with the dragon, they take their own lessons to heart.

The robot in the Los Angeles trial costs about $5,500 when stylish touches such as fur, feet and wings are added. The effort is the first of several robot experiments planned and is backed by a five-year, $10 million grant from the National Science Foundation. It will be conducted by a coalition of researchers from Yale University, the Massachusetts Institute of Technology, the University of Southern California and Stanford University.

Researchers see the classroom robots not as replacements for teachers but as whimsical assistants programmed to push kids' buttons. But some see the mechanization as the latest example of technology undermining the importance of human connections in the classroom.