How to do electrical conductivity tests?

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Cheesycheese213
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Our teacher gave us a lab, and we have to write a procedure on how to test the electrical conductivity of multiple substances. However, on the materials, all that was written was "electrical conductivity tester", which I'm not sure what it is since we have not learned about it at all, and in the textbook it says "conductivity apparatus".
The things we were given include salt, candle wax, toothpaste and sand.
Should we be putting them into water and then sticking it in, or just by itself?
Thanks!

p.s. In one of the questions, it asked about standing in a puddle with salt or sugar, so I am guessing it is in water, but how would that work for something like wax or sand?
 
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Cheesycheese213 said:
"electrical conductivity tester"
That's probably just a DVM. have you used a DVM in your labs before?