How do you hit the curveball?
How do you hit anything other than a fastball down the middle?
Adjustability the answer those common, and critically important, questions.
Adjustability?
Adjustability is exactly what its name implies; the ability to adjust to the type, movement, and location of the pitch.[1]
If you are going to be successful beyond 6th grade or so, you have to learn about the three main types of Adjustability...
I have put together a number of pieces about Adjustability...
... X-Axis Adjustability
...... X-Axis Adjustability and Hip Rotation
... Y-Axis Adjustability
...... Tilt
... Z-Axis Adjustability
...... Delaying Mechanism
... Adjust Late
X-Axis Adjustability
X-Axis Adjustability enables you to adjust horizontally and cover the inside and outside parts of the strike zone.
Y-Axis Adjustability
Y-Axis Adjustability enables you to adjust vertically and cover the top and bottom of the strike zone.
Z-Axis Adjustability
Z-Axis Adjustability enables you to adjust to the speed of the pitch and hit off-speed pitches like change-ups and curveballs.
Notes
[1] I think one of the weaknesses of Mike Epstein's system is that he generally ignores the concept of Adjustability and, when he does talk about Adjustability, he gets it wrong.