Which type of strategies is being used?

Phoneme deletion involves removing a phoneme from a word to form a new word, such as changing "cat" to "at" by deleting the initial sound. While this strategy can aid phonemic awareness, it does not specifically focus on building vocabulary through frequently used words in everyday speech, which is the primary objective stated in the question.

Incidental learning refers to acquiring knowledge unintentionally or without direct instruction, such as picking up vocabulary through conversation or reading. While it contributes to language development, it does not involve the structured approach of multisensory strategies aimed at explicitly teaching frequently used words.

Phoneme substitution entails replacing one phoneme in a word with another to create a different word, like changing "bat" to "bat" by substituting the "b" with "c" to form "cat." Similar to phoneme deletion, this method focuses on sound manipulation rather than directly enhancing vocabulary knowledge through multisensory engagement.