You will learn
- Name a prefix and a suffix.
- Read words with prefixes.
- Read words with suffixes.
- Work out simple meanings.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- A prefix comes before the base word.
- A suffix comes after the base word.
- un- means not; re- means again.
- -ful means full of; -less means without.
Words to know
a word part added at the start
a word part added at the end
the main word before parts are added
a prefix or a suffix
1. Discover: The helpful teacher
Ms. Bello was a helpful teacher. She asked the class to retell the story. Tolu was unhappy because his pencil was useless, so Ms. Bello gave him a new one. Tolu said, Thank you, now I am careful and happy.
Think: Which words have a prefix? Which have a suffix?
2. Understand: Word parts that change meaning
Idea 1: Prefixes
A prefix comes before a base word: un+happy = unhappy (not happy); re+tell = retell (tell again).
Idea 2: Suffixes
A suffix comes after: help+ful = helpful (full of help); use+less = useless (without use).
Idea 3: Using affixes
Find the base word, then think what the prefix or affix adds. Check the meaning fits the sentence.
3. Worked examples
Example 1 (I show you): Prefix
What does unhappy mean?
- un means not.
Answer: not happy
Example 2 (We do it together): Suffix
What does helpful mean?
- ful means full of.
Answer: full of help
Example 3 (You try): Base word
What is the base word in useless?
Show the steps and answer
- Remove less.
Answer: use
Did you know?
The prefix un- is one of the most common prefixes in English.
Why this matters
Affixes help you read and understand many new words.
4. Explore: Affix builder
Build words with affixes.
- Choose a base word.
- Add un- or re-.
- Add -ful or -less.
- Write what each word means.
Think about it: what did you notice?
You can build and read new words.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- The base word is ___.
- The prefix is ___, meaning ___.
- The suffix is ___, meaning ___.
- So the word means ___.
Guided practice
Question 1. A word part added at the start is a ___.
prefix
Question 2. A word part added at the end is a ___.
suffix
Question 3. The main word is the ___ word.
base
Independent practice
Level 1: Start
- A word part added at the start is a ___.
- A word part added at the end is a ___.
- The main word is the ___ word.
- The prefix un- means ___.
- The suffix -less means ___.
Level 2: Grow
- Add un- to kind.
- Add re- to write.
- Add -ful to care.
Level 3: Stretch
- Is re- a prefix?
- Is -ful a suffix?
- Can affixes change meaning?
Answers are in the answer key below. Try first, then check.
6. Apply: English in everyday life
Find five words with prefixes or suffixes in a book.
Show a sample answer
five words
Another one. Find five words with un-, re-, -ful or -less and say what each means.
Show a sample answer
a completed task
7. Common mistakes
Fix: Slow down and check your work.
Fix: Study the example first, then try.
8. Lesson summary and revision card
- I can name a prefix and a suffix.
- I can read words with prefixes.
- I can read words with suffixes.
- I can work out simple meanings.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- A prefix comes before the base word.
- A suffix comes after the base word.
- un- means not; re- means again.
- -ful means full of; -less means without.
11. Next lesson
Next lesson: Base words and roots. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- What is a prefix? Give one example. [2 marks]
- What is a suffix? Give one example. [2 marks]
- What does unhappy mean? [1 mark]
- What is the base word in helpful? [1 mark]
- Explain how to work out the meaning of an unknown word with an affix. [3 marks]
Total: 9 marks.
Marking guide and model answers
- a word part added at the start [1]; un-/re- [1]
- a word part added at the end [1]; -ful/-less [1]
- not happy [1]
- help [1]
- find the base word [1]; know what the affix means [1]; combine and check the sentence [1]
Score guide: 8 to 9 = secure. 6 to 7 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- A word part added at the start is a ___.
- A word part added at the end is a ___.
- The main word is the ___ word.
- The prefix un- means ___.
- The suffix -less means ___.
- Add un- to kind.
- Add re- to write.
- Add -ful to care.
- Is re- a prefix?
- Is -ful a suffix?
Homework
Find five words with un-, re-, -ful or -less and say what each means.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. A word part added at the start is a ___. | prefix | 1 |
| 2. A word part added at the end is a ___. | suffix | 1 |
| 3. The main word is the ___ word. | base | 1 |
| 4. The prefix un- means ___. | not | 1 |
| 5. The suffix -less means ___. | without | 1 |
| 6. Add un- to kind. | unkind | 1 |
| 7. Add re- to write. | rewrite | 1 |
| 8. Add -ful to care. | careful | 1 |
| 9. Is re- a prefix? | yes | 1 |
| 10. Is -ful a suffix? | yes | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 prefix; 2 suffix; 3 base; 4 not; 5 without. Level 2: 1 unkind; 2 rewrite; 3 careful. Level 3: 1 yes; 2 yes; 3 yes.
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Name a prefix and a suffix | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 Read words with prefixes | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Read words with suffixes | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Work out simple meanings | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: Rushing without checking. Slow down and check your work.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Re-read the examples slowly and use the sentence frames.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
For parents and guardians
In this lesson your child practises a key Grade 3 English skill with clear examples and a quiz. You do not need to be an expert to help.
- Listen while your child explains the idea.
- Ask for one new example.
- Praise effort and careful work.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: name a prefix and a suffix; read words with prefixes; read words with suffixes; work out simple meanings.
Prerequisite knowledge. Syllable patterns.
Materials. Chart paper or board, pencils, picture or word cards, a reading book if available. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Write the key words and examples on the board or on cards before the lesson.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Introduce the idea with the opening example.
Explanation (10 min). Teach the key words.
Guided activity (10 min). Practise together.
Independent activity (10 min). Check understanding with the quiz.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What is the key idea? Can I give my own example?
Teacher explanation notes. Move from the spoken word to pictures and then to print. Read aloud often, point to the words, and let learners hear and say before they read and write.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use the sentence frames and work with a partner. Extension. Create a harder example of your own.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. Rushing without checking. Slow down and check your work.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 9-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Re-read the examples slowly and use the sentence frames. Enrichment. Make up your own example and teach it to someone at home. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: Common Core State Standards for English Language Arts, Cambridge Primary and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Official standards for this topic area. Common Core State Standards for English Language Arts (official site): Grade 3 » Reading: Foundational Skills. These pages list the standards that cover this topic area; read them alongside the lesson.
Research used to shape this lesson. Common Core RF.3.3a (identify and know the meaning of the most common prefixes and derivational suffixes) and L.3.4b; Cambridge Primary English Stage 3 (vocabulary). These sources informed the lesson.