A teacher shows a class cards with various words and reads them aloud pronouncing certain written units distinctly. This exercise exemplifies which concept?

The exercise being described is best exemplified by the concept of phonemic segmentation. Phonemic segmentation involves breaking words down into their individual phonemes or sounds. When a teacher pronounces specific written units distinctly, they are helping students recognize the discrete sounds that make up words. This practice is crucial for developing phonemic awareness, which is a foundational skill for reading and spelling.

In this activity, the emphasis is on identifying and isolating sounds, rather than focusing on the structural components of words like morphemes or syllables. This distinguishes phonemic segmentation from other concepts such as morpheme division or syllabication, which focus on the structure of words rather than the individual sounds. By isolating sounds, students can improve their ability to decode words, thereby enhancing their overall literacy skills.