Thank you for your question, my name is Richard.
the basis of the Vlookup is as such.
you put the formula in the Cell you want to display one of the results, in my example the Name.
The format of the vLookup is as follows
=vlookup(lookup value, table where values reside, column # XXXXX values are located, false)
So in out example, the lookup Table is the actual value we are looking up, in your case it is the Student ID, so lets say that is in Cell A1
Then the Table where the Values reside, is where the Student ID and Name are stored. This will be large I assume and in our example, we use rows A & B (so B being the ID's and C being the Name's)
The last is the Colume number, so which columne value we want to return. So in this example, as Name is XXXXX XXXXX we specify 2.
and thats it. The formula will look at the ID in A1, search through the lists of ID's and Names in columns B & C and return the name from C
I also have a tutorial on how this works which you can view here.http://www.experiglot.com/2007/11/19/how-to-use-vlookup-in-excel-a-simple-tutorial-part-i/
Let me know how you go, and if you have any difficulties, please do not hesitate to let me know.