The HC-05 is a bluetooth to serial adapter that can act as both a master and a slave. This post will show an example wiring diagram and some sample code to check that everything it working.
This post assumes that you have been divided into pairs. With one of you having a hc-05 pre-configured as a master and the other as a slave.
Decide between yourselves who will act as master (remote control) and slave (robot that is controlled).
How It Works:
The master acts as the remote control. It sends commands to the slave robot . The slave robot has code on it that listens for these commands and performs certain actions like for example drive forward, turn, etc.