A component of developing jaw stability, dissociation, and grading is to teach symmetrical jaw strength at each jaw height position with this set of tools (six Graduated Bite Blocks). Standard co-articulation of all speech sounds involves the development of jaw stability, dissociation, and grading. When trying to build jaw stability by exercise, the tools are first used to identify jaw stability or instability. To ensure the effectiveness of this programme, read ALL of the directions before beginning.