Why not just make it semi-simple for him? lol
You want to use the ITOA Command (Integer TO Ascii).. You can also use the 'sprintf' if you're more comfortable with C.
http://www.cplusplus.com/reference/clibrary/cstdlib/itoa/
For example, at the top of your sketch, you'll want to make a buffer:
char myData[5]; // BEFORE SETUP
Now, inside the loop where you want to change the integer:
int myValue = analogRead(0);
itoa(myValue, myData, 10); // does same thing as sprintf, put's myValue into a String called myData, then you print that string on the lcd! (this can also be used for almost any kind of variable)
lcd.print(myData);