Check out his fonts. Briem Script might be useful in teaching handwriting. In contrast, his Gauntlet font is far out, so far out that it must be studied to be figured out. This company provides a wide range of materials for school and home education of children and young adults. They sell materials for two handwriting systems and have pages comparing the two systems.
Daily practice focuses on verses from Scripture.
Getty-Dubay Italic Handwriting teaches a kind of printing that leads to a cursive having similar letterforms so that transition from print to cursive is easy.