I am using Wilson Fundations for handwriting. Formation of each letter is very specific. The language used is consistent and easy to remember. The lines are as follows: Sky line, plane line, grass line and worm line.
Formation of Letters
Sky Line: t b f l h k
Plane Line: n m i r u e p j v w q u
Plane Line Round: c a o g s d
Plane Line Slide: z y x