The Sound Boxes and Auditory Discrimination
Auditory refinement is often overlooked in traditional education, but in Montessori, it is a key component of the sensorial curriculum. The Sound Boxes consist of two sets of six wooden cylinders filled with different materials (like sand, rice, or beads) that produce varying sounds when shaken. The child’s task is to match the pairs and then grade the sounds from loudest to softest. This activity requires intense focus and a quiet environment. By refining their ability to hear subtle differences in volume and tone, the child is being prepared for the phonetic work of language. Literacy begins with the ear; a child must be able to hear the individual phonemes in a word before they can learn to read or write it.
The Bells and Musical Education
The Montessori Bells are one of the most sophisticated sensorial materials, providing a concrete introduction to the musical scale. The set consists of two series of bells that look identical but produce different pitches when struck with a mallet. The child learns to match the bells and then arrange them in the sequence of the C Major scale. Unlike a piano, where the keys are physically arranged in a line, the bells can be moved around, requiring the child to rely entirely on their ear to find the correct order. This work fosters a deep appreciation for music and provides the foundation for musical theory. It also reinforces the child’s ability to concentrate and follow a complex, multi-step process toward a harmonious goal.
The Thermic and Baric Senses
The sensorial curriculum extends to the “internal” senses of temperature and weight. The Thermic Bottles (filled with water of different temperatures) and Thermic Tablets (made of different materials like marble, wood, and felt) help the child refine their thermic sense. By touching these materials, the child learns to distinguish between “warm,” “cool,” “lukewarm,” and “cold.” Similarly, the Baric Tablets—which are identical in size but different in weight—help the child develop their baric sense. This work is often done while blindfolded (or with eyes closed) to ensure the child is relying solely on their hands. This sensory deprivation increases the sensitivity of the remaining senses, allowing the child to perceive differences that would normally be ignored.
Integration of Senses and Holistic Development
The goal of auditory, thermic, and baric work is the holistic development of the child. By refining these “forgotten” senses, we help the child become more present and mindful in their body. This mindfulness is a key part of the Montessori “normalization” process. A child who is sensitive to the weight of a pitcher or the sound of a closing door is a child who moves with grace and respect. These sensorial experiences are not isolated lessons; they are part of a larger curriculum of “Grace and Courtesy.” By educating the senses, we are essentially educating the child’s soul, helping them to interact with their environment and their community with greater awareness and intentionality.
