1. 1. Digraph CK Stability: The combination -ck provides a stable terminal spelling for the /k/ sound following any of the five short vowels (ă, ĕ, ĭ, ŏ, ŭ).
2. 2. Initial Consonant Blends: Notice how blends of two consonants (bl-, fl-, tr-, br-) and three consonants (str- in struck) precede the short vowel without altering its quality.
3. 3. Irregular Strong Verb: Struck:struck is the irregular past tense of strike (ablaut mutation: strike → struck), adopting the short ŭ + -ck pattern.
Wheeler's Elementary Speller • Lesson 157 • 12 Vocabulary Words in -ck • Wheeler Lesson 157Page 1 of 2 (Student Worksheet)