The teaching video focuses on five rules: (1) Use k for the /k/ sound when it comes before the letters: e, i or y (2) Use c for the /k/ sound when it comes before the letters: a, o or u (3) Use c for the /k/ sound when it comes before consonants: l, r or t (4) Use ck at the end of a one syllable word that follows a short vowel (5) Use the letters ic for two or more syllable words that in the /k/ sound. The link for the video is https://youtu.be/Z2QAWMgdQfg