1) Teachers should introduce the sound "ck" using flashcards or posters and make the "ck" gesture when saying the sound. 2) Children learn sounds better when singing songs containing words with the target sound. The song for "ck" should include many "ck" words. 3) It is important for children to learn to write the sounds they are studying. For "ck", have children write the sound next to pictures containing "ck" like "castanets" and "kite".