Based on a true story, this inspiring American Playhouse production stars Edward James Olmos as a high school teacher who motivated a class full of East L.A. barrio kids to care enough about mathematics to pass an Advanced Placement Calculus Test. Not exactly a variation of To Sir, With Love, the film concerns itself with assumptions and biases held by mainstream authorities about disadvantaged kids, and Olmos's efforts to keep his students coolheaded enough to prove them wrong. Olmos, virtually unrecognizable as the pudgy, balding instructor, gives a career performance in this fine piece directed by Ramón Menéndez, and written by the director and Tom Musca. --Tom Keogh