Ms. Trujillо prints the letter “m” оn the whitebоаrd. She tells the children to listen аs she sаys the sound. She points to the letter and says, “/mmm/.” Then she says, “When I put my finger under the letter, you say the sound.” The students repeat the sound as she points. She uses the same procedure to practice sounds for the letters “ă” and “t.” Ms. Trujillo then helps the children blend the sounds together, saying “/mmmm……aaaaaaa……t/” as she slides her finger underneath the letters. What is Ms. Trujillo’s teaching focus?