Unit 1: Tracking is the braille student workbook from the Mangold Basic Braille Program. It contains the braille worksheets from the first fifteen lessons of that program which focus on developing tactile discrimination, proper hand position, and rapid tracking. Unit 2: Alphabet is the braille student workbook from the Mangold Basic Braille Program. It contains the last fifteen lessons of that program which systematically introduce the letters of the alphabet. These items are sold separately to accomodate teachers who have purchased the Mangold Basic Braille Program teacher's manual. The print teacher's manual (not included) has step-by-step instructions, print replicas of each braille worksheet and should be used in conjunction with the braille student workbooks. Formerly known as Mangold Developmental Program of Tactile Perception and Braille Letter Recognition. This product hasn't received any reviews yet. Be the first to review this product!