Student Presentation on Plumbing, c. 1912

A male student in uniform standing in the center of a stage set up in the gymasium building.  On his right a male student in overalls stands next to a radiator on a table. On his left a male student simulates fixing a sink in a model of a bathroom. 

This is probably part of the end-of-year annual examinations at the school, at which students would make presentations to demonstrate their progress.