Color, lines, and arrows are used to teach the proper formation or writing
of letters, numbers or other characters. For each part of a character
requiring the lifting of the writing implement, a different color within
a character outline is displayed. Color is also used to teach the proper
sequencing of writing a character. Where directional changes may be
confusing because of a lack of color change, arrows show directional
changes within character segments. The instructional character set may be
presented to students as a color reference guide, or may take other forms
such as a coloring book, flash cards, or a computer program.