Playing from the C position

If you took the Test Drive, you already know that you play with all fingers and thumb, and that you don't peck out a tune with your index finger.  The goal of good hand placement on the keyboard is to maximize the number of notes that can be played without moving the entire hand left or right.  So generally to play a sequence of notes, you want the thumb of your right hand on the lowest note in the sequence.  This way you have a 5 note range within which you can play without moving your hand. 

For beginner's, the simplest tunes are played only on the white keys, the naturals, because they're wider and all in the same row.  Also for beginner's, the tunes first learned are in the C Major scale (if you don't remember what this is go here) which means two things:  it's comprised of all white key notes and the starting (lowest) note in the scale is C (but not necessarily the lowest note in the score).  If you took the Test Drive, the musical snippet there is an example of C Major and it is replicated below.  And the playing of it illustrates this technique of putting your thumb on the lowest note in the sequence (C4).  Because the snippet has a range of only five notes, moving the hand left or right is unnecessary.