Wire the data and clock signals from the arduino to the sensor. Also put power and ground to the sensor. Wire a 4K7 pull up resistor on each of these two signals.
Read the data sheet to see what address the sensor is at and read the I2C examples in the IDE to find out how to read data from this sensor.
All this means interfacing the sensor to the arduino.
I would suggest that the vagueness lies with you rather than the lecturer.