Lab on refractive index of water

I have to setup a lab for finding out refractive index of water. Can someone tell me the procedure and materials required for the lab? I will really appriatiate it

I would use a fishtank for the experiment and have it half filled with water.

Then you can use a laser pointer to shine into the fish tank. From the side of the tank, you will then measure the angle of incidence.

Good luck!