Other Tutorials:

ieuan111 (video)

     The 423 is a simple three ball pattern made up of alternating Two-in-ones from each hand. While not a particularly interesting or impressive pattern on its own, the 423 siteswap is the foundation of many dynamic tricks, such as Takeouts and Burke's Barrage.

    To learn the 423, start with two balls in your dominant hand and one ball in your non-dominant. Start juggling a Two-in-one with your dominant hand, and then toss one of the balls to your non-dominant hand. When that ball nears your non-dominant hand, throw the ball in that hand as if doing a Two-in-one, and then catch the ball thrown from your dominant hand.
    As shown, practice this on both sides. To run the full pattern, just make another throw across your body after the final throw of the step shown above, and continue the pattern of one Two-in-one throw followed by a throw between hands.