In general, the subject matter described in this specification can be embodied in methods for accessing a presentation stored on a remote server with a first computing device that is connected to the remote server over a network. The first computing device communicates with the network over a wireless connection. The first computing device is used to cause a second computing device to display the presentation. The second computing device is connected to the remote server over a network. The display of the presentation is substantially controlled with communication between the first computing device and the second computing device. The communication occurs only through the remote server.