This paper presents a new collaborative e-learning system based on a real-time synchronized communication among virtual laboratories. This original approach provides a new tool which integrates virtual laboratories inside a synchronous collaborative e-learning framework. This system is based on the automatic generation of WebGL simulations from 3D Easy Java Simulations applets. These WebGL simulations created are synchronized through the Internet in order to integrate them in an on-line collaborative environment. In this way, several students can attend in a virtual class using only a communication device using any web-browser with WebGL enabled. The paper also describes the software architecture in which is based on this new education tool.