How useful are the views of public school students about their teachers?

Quite useful, according to preliminary results released on Friday from a $45 million research project that is intended to find new ways of distinguishing good teachers from bad.

Teachers whose students described them as skillful at maintaining classroom order, at focusing their instruction and at helping their charges learn from their mistakes are often the same teachers whose students learn the most in the course of a year, as measured by gains on standardized test scores, according to a progress report on the research.

Financed by the Bill and Melinda Gates Foundation, the two-year project involves scores of social scientists and some 3,000 teachers and their students in Charlotte, N.C.; Dallas; Denver; Hillsborough County, Fla., which includes Tampa; Memphis; New York; and Pittsburgh.

The research is part of the $335 million Gates Foundation effort to overhaul the personnel systems in those districts.