The Oliver Program wanted to give us every advantage so we were required to take preparatory classes to hone our skills before prep school.
The groves on the keyboard are for the long fingers closest to your thumbs. The six fingers on either side of the two fingers closest to the thumbs allow you to reach every key. The thumbs are for the space bar. Arch your fingers above the keyboard so that your wrists do not touch the keyboard.
Up until entering this class I hit every key with the same three fingers. My forced transition was fueled by vigilant testing and grading and my fear of having to repeat the class. By the end of the summer the new method of typing was safely engrained and I would never revert to the three finger method again.