CVC Worksheets Printable Work Sheets • KeepKidsReading Short 'o'/Short 'i' Worksheet. Short 'o'/Short 'u' Worksheet. The first and last letter are given and the focus is on hearing and identifying the vowel sound. CVC Vowel Mix Sheet 1. CVC Vowel Mix Sheet 2. CVC Vowel Mix Sheet 3. The vowels are dotted in as the focus here is identifying the beginning and ending sounds.