Reply To: number lines definitions
When number lines have been created using braille dots (for grades 4 and up, as opposed to a tactile drawing), whichever symbols have been used in their construction should be listed on the Special Symbols page of that braille volume. The intent of the chart on page 6-15 of Guidelines and Standards for Tactile Graphics, is to follow the wording that is shown. You do not have to separate the "Distinctive Coordinate Markers" from the rest of the symbols used--place them all under a cell-5 heading (Number Line Braille Symbols), on the Special Symbols page. Specifics for grade 4 and up are found on pg 6-26 of Guidlines and Standards.
Betty