A simple one -- Hop turn. It's simple, but you should be careful not to twist your ankle! Only one foot touches the board in this exercise. Pivot using the front of the foot while turning turning around on the board.
More details: The Hop turn is a simple way to get to the other side of the bench. It's also known as a "Pivot turn".
This move is done in 4 phases:
1. Step sideways up onto the bench with the the lead foot.
2. Lift your other knee, as you pivot on the ball of the lead foot.
3. Bring the other foot down on the other side of the bench.
4. Step down with the lead foot to the other side of the bench.