This Montessori Materials Bundle includes upper and lower case and numeral sandpaper letters. This set of Sandpaper Letters is an excellent resource for your tactile learners, as well as reinforcing fine motor skills for younger learners. This set is a very useful resource for home or classroom learning activities, and helps students with special needs by providing sensory input to their literacy skills. The cards have arrows indicating where to start tracing and in which direction. Tactile letters are the recommended way to introduce the phonetic alphabet and phonetic word building to young children just starting to learn to read. Grades K-1. Help children learn correct numeral and letter formation through tactile experiences. 3 1 2" numerals have directional arrows to ensure proper formation. Durable plastic cards, 0- 9 measure 4 1 4" x 2 5 8".