The letter c makes two sounds, but only the /k/ sound is introduced at this level.  As a student reads the story, show them that the letter c is staying constant in the words, Cam, cat, can, and cap.  Only the ending sounds are changing.  In addition, June Orton continues to only use the  short /ă/ sound so that the student is getting a great deal of practice manipulating the ending sounds.  It seems like an easy concept, but for  students with dyslexia, this can be incredibly challenging.