Here's how I do it.  I draw this on the whiteboard.
[Linked Image from i945.photobucket.com]

I tell him, "this is the  x 5 ='s".  "your pattern is erase four, leave one, erase four, leave one".  

I walk away, he does this:

[Linked Image from i945.photobucket.com]

Then he fills in the multiplication facts from the number line.    This is supposed to teach them the size of the numbers they are working with while they memorize them.  
The skip-counting songs help so they can check their work.  For example my son just counted wrong while erasing so that his answers were 5, 10, 15, 26.  He caught it immediately and came told me something was wrong because of a skip counting song.  (he doesn't always catch it).



Youth lives by personality, age lives by calculation. -- Aristotle on a calendar