Mrs. Bоnifа, а secоnd-grаde teacher, teaches high-frequency wоrds daily. As part of this instructional routine, she first asks students to identify the number of sounds in each word. Then, she models the phoneme-grapheme correspondences using sound boxes and identifies any irregularities or graphemes they have not yet been taught. She provides opportunities for students to practice reading and writing the words. Finally, she uses dictation sentences and decodable texts to give opportunities for students to practice decoding and encoding these high-frequency words. What is Mrs. Bonifa’s instructional focus?