Suffixes for Kids: Game, Rules and Examples
A suffix is added to the end of a word to change its meaning or job: care + ful = careful, quick + ly = quickly, kind + ness = kindness.
Tricks that make it easier
- -ful means full of; -less means without: hopeful, hopeless.
- -ly often turns an adjective into an adverb: slow → slowly.
- Change y to i before most suffixes: happy → happiness, happily.
Common mistakes
- Writing -full instead of -ful (careful has one l).
- Forgetting to change y to i (happyness).
- Not doubling the last letter when needed (hoping vs hopping).
A five-day practice plan
| Day | What to do (10 minutes) |
|---|---|
| Day 1 | Play Prefixes & Suffixes on this skill for 5–10 minutes. Read the explanation after every mistake. |
| Day 2 | Learn one trick from this page and use it out loud while you play. |
| Day 3 | Print the worksheet and try it without help. Mark it with the answer key together. |
| Day 4 | Play again and try to beat your personal best score or get three stars. |
| Day 5 | Mix it up: try the ⏱️ Timed test, or ask your child to explain the skill to you in their own words. |
Suits 2nd Grade and 3rd Grade and 4th Grade and 5th Grade.
Frequently asked questions
What is a suffix?
Letters added to the end of a word, like -ful in careful or -ness in kindness.
Why does happy become happiness?
When a word ends in a consonant plus y, the y usually changes to i before a suffix.
How many l’s in -ful?
One: careful, helpful, beautiful.