Shots of children milling about before class. Shots of children acting out a song (?) at Fairmount School, San Francisco. MSs, CUs of professor demonstrating gyroscopic effect with top, with small gyroscopes. HALS of class from back of auditorium, professor speaking, writing in background, of movie screen over his head. PAN over backs of students, FRONT FOCUS on girl knitting. HAS of professor at front talking with students at end of class. Shots of stage revolving and setting scene for next class. Various shots of class in laboratory, instructor writing on blackboard, setting up experiment. Various shots around oscilloscope, of student working on oscilloscope. CUs of faces of students, of instructor. Several MSs, MCS of children in kindergarten at Berkeley University.