This activity uses your ability to listen to the first sound in a word.  You then write the letter you need for that sound, and listen for the next word to write the next letter.  The new words we will be writing are put, us and bus.  There is also a reminder of the words her, here and there from Lesson 23.  

This strategy for the words where we have something extra to remember is also called a mnemonic.  Choose the strategy that suits you best, or use both.