Web based quiz show buzzer system

I would like to build a web based buzzer system for classroom games. The students would all be on laptops, tablets, phones etc and there would be some kind of web based server, run by the teacher that could show results/play sounds for the fastest reactions. The teachers system would need to be fast enough to make the results/buzzers seem realistic.

Is there anyway I can get accurate reaction times as well as a fast web based reaction system? What protocols could I use? Could I use the same systems real-time games use?