Click, Cluck, and Quack
The ck digraph is a highly reliable digraph. The letter c in the digraph is silent. It appears in the final position in words, as in duck, or in the medial position, as in chicken. The ck digraph can be confusing to children because the c is silent. The ck digraph makes the /k/ sound. The consonants k, as in bike, q as in bouquet, ch as in chaos, and c, as in camp also make the /k/ sound.