The station is being built one piece at a time. Each piece is sent into space and connected to another piece. Some of these pieces are called modules, nodes, solar arrays, and radiators.
Once the ISS is completed, it will be used as a space laboratory and research center for scientists and engineers. Some people will live there full-time, and there will even be parking spaces for spacecraft that visit the station.
Move your cursor over the picture below. When the tiny hand appears, click your mouse to discover the function of each part of the ISS.