A major factor contributing to the development of the Zaner-Bloser teaching script was Zaner's study of the body movements required to create the form of
cursive letters when using the 'muscular arm method' of handwriting – such as the
Palmer Method – which was prevalent in the United States from the late 19th century. The Palmer Method had been developed around 1888 as a simplification of the then-established elaborate
Spencerian Method and had quickly become the most popular handwriting system in the US. Zaner considered the hinge action of the forearm as the 'central energy of movement' and that its relation to the direction of writing, or page angle, could affect letter form and the effort required. By changing from a page angle which placed letter down strokes on a line towards the center of the body, as other educators advised, Zaner offered a means to link muscle effort with balanced (medium), condensed (compact style), or extended (running hand) letter forms. In most styles of cursive handwriting that existed in Zaner's time, the fingers used to support and steady the hand on the page for arm movement were fixed in relation to the pen (a typical instruction to writers according to the Palmer Method was that "the nails of the third and fourth fingers should rest lightly on the paper, and should follow the course of the pen in every direction"). In order to simplify the process of writing by hand, Zaner analysed how professional users of the then-existing handwriting styles used their 'rest' fingers to control movement. For writing lower case letters, Zaner recommended a technique of letting the little finger slide to the right in making up strokes, but to rest or drag for down strokes in order to improve control of the arm movement. This required the joints of the 'rest' fingers to act on the down strokes, independent of those holding the pen, which Zaner termed as 'hand action'. Zaner's studies and Bloser's contributions gave rise to a simplified ('streamlined') form of the script used in the Palmer Method. ==Prevalence==