Sandpaper letters are a set of tactile, textured letters in the shape of print or cursive writing, typically made from sandpaper or another rough material. These letters help children learn the shapes of letters by tracing them with their fingers while saying the corresponding sound. By using the sense of touch, children can internalize the shapes of letters and develop muscle memory for writing and phonemic awareness.

Movable alphabets are sets of physical letters that children can manipulate and arrange to form words. These letters are typically made from wood and are color-coded to help children differentiate between consonants and vowels. Movable alphabets are vital material in Montessori language exercises, allowing children to practice spelling, phonics, and word building in a hands-on and engaging way. A sample activity is to provide the child with Montessori moveable alphabet letters and a list of simple words to spell. The child can practice spelling and reading the words by arranging the letters correctly.

Montessori grammar symbols are a set of small, abstract symbols that represent different parts of speech, sentence structures, and grammatical concepts. These symbols include shapes like circles, triangles, and squares, each with a specific meaning in the context of grammar. By using these symbols, children can visually and concretely understand the rules and structure of language, making grammar more tangible and accessible.