1st Grade Short O Word Families Worksheets
Short o is the friendliest vowel sound to isolate, which makes these families (-op, -ot, -ock) a confidence builder. First graders sort quickly, meet a silent letter in knock, and reinforce the ck ending they saw with short i.
Free printable PDF, aligned to Common Core RF.1.3. One skill per page, answer key on page two.
Every sheet is one of a kind and prints with a version code, so you can reprint the exact same one later. New version every click.
The kind of words you'll sort
Say each word. Write it under its family.
stockjotfloppotstopdockblockhotcroplotknockmop
Columns: -op and -ot and -ock. "stop" belongs under -op; "lot" belongs under -ot; "knock" belongs under -ock.
Every print draws a fresh mix of word lists at this level, so a make-up test or a second sibling gets a different sheet.
What's on each sheet
- Sorting. Say each word. Write it under its family. 15 words per page.
Every version prints on US Letter or A4, with its answer key on the last page.
How to teach this
Race the sort, then reverse it: name the family and ask for members with eyes closed. The -ock column extends the ck rule from the short-i sheet, and a quick "why do sock and stick both end in ck?" makes the pattern conscious.
Watch for: Knock keeps a silent k at the front, but its ending still sorts it into the -ock family. The word not is a family word here, nothing more: -ot like hot and pot.
Common questions about short o word families
- How does this sheet build on the short-i families?
- The -ock column continues the ck story: after a short vowel, the k sound ends in ck (kick, sock, duck). Meeting the same rule with a new vowel turns a one-off observation into a real pattern.
- My child reads hot as hat. What helps?
- Family sorting, exactly. Hot lives in a column that rhymes with pot and dot; hat lives with cat and bat. When words belong to neighborhoods, the vowels stop being interchangeable, and the rhyme catches the error instantly.
Related worksheets
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Aligned to Common Core RF.1.3. Reviewed by the One More Sheet curriculum team. Content version 68, updated July 2026.