I remember a movie similar to 'to sir, with love' that featured a scene where student were to approach the public to get answers to questions with different approaches and success of the approach compared. I think it was in the seventies.
Any ideas of the movie name?

This movie has similar scenes

A Piece of the Action (1977) has two similar scenes where student delinquents interact with the public learning different approaches to asking for information and directions. Starring Bill Cosby and Sidney Poitier

I was thinking the same as kouya