Boyle's Law states that there is a constant temperature and the pressure and volume are inversely related. The Straw lab I think was a good example of this law. The temperature stayed the same the whole time but the pressure changed as we added more by twisting the ends of the straw which push all the air right into the middle. The volume would go down because pressure and temperature are inversely related.

Charles's Law states that there is constant pressure and the temperature and the volume are directly related. I think the air compressor was a good example of this law because as the air was put in the bottle the pressure stayed constant going into the bottle the temperature went up, we watched the temperature go up and the volume went up and stayed directly related to the temperature.

Gay-Lusaac's Law states that there is a constant volume and the pressure and temperature are directly related I think the balloon that we tried to suck in the flask was a good example of this law. the volume stayed constant when the balloon was suck into the flask but the temperature went up when we put it on the heater and pressure went up too and they both stayed directly related.