The toughest CVC sheet combines word family analysis with sound substitution. Multiple-choice questions ask first graders to find the odd word out in the -en family, change vowels to build new words, and identify short vowel sounds. The fill-in-the-blank section reinforces the -og family, asks students to swap initial letters, and prompts them to recall a CVC word for a short sleep ('nap').

It's a strong readiness check before moving to blends and digraphs.