How do I get a macro to select a random string

Ok, So at school, we have a maths test thing, called Rainbow Maths. As I have completed it; I was asked to make some more. How ever, every class needs different questions. I decided to make a Rainbow maths genarator so every class can run a macro; and create there times table/ maths questions.

Ok. So what I would like to do is make a random selector. I can have a list in my code and it can randomly select one of the x amount of items in the list. I have worked out how to do the rest; its just this random selector. I am using Excel 2010. Thanks -

Sodex