Final answer:
The teacher's strategy is phonemic manipulation, which is a part of phonics instruction in English. It helps students understand the impact of changing sounds within words.
Step-by-step explanation:
The teacher's strategy of having students replace the 'h' in 'hat' with a 'p' to form a new word is an example of phonemic manipulation, which is part of phonics instruction in the English language. This specific activity helps students understand how changing one sound can change the meaning of a word, thereby fostering phonemic awareness and reinforcing the connection between letters and sounds.
Additionally, it's typical in phonics lessons to analyze letter patterns and the spelling of sounds in various contexts. For example, a teacher may ask students to underline the letter that spells [p] in the word 'perfect', and then ask them to analyze the pattern of sounds that follow the [p]. In the context of words ending with either or, the exercise enables students to distinguish when to use a single or double based on word structure and phonetic rules.