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      Using and spelling the prefix un-

      Lesson details

      Learning outcome

      I can spell words using the prefix un-.

      Key learning points

      1. A prefix is a letter or group of letters at the start of a word which creates another word.
      2. The prefix 'un-' is added to the beginning of a word without changing the spelling of the root word.
      3. The prefix 'un-' usually means not.

      Keywords

      • Prefix - a letter or group of letters added to the start of a word to change its meaning

      • Root word - the base word from which other words are formed often by adding prefixes or suffixes

      Common misconception

      Pupils don't see the spellings of words with the same root word as connected.

      Explicitly show how the spelling of the root word stays the same when the prefix is added.

      Teacher tip

      There will be different elements of the words that children find hard to spell, such as the double 'p' in happy or 'ea' in healthy. Discuss these aspects when you read the words to help the children when they come to spell them independently.

      Licence

      This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      What is the missing word? A __________ is a letter or group of letters at the end of a word which creates another word.

      Correct answer: suffix
      prefix
      affix

      Q2.
      Match the word to its meaning.

      Correct Answer:happy,feeling joy or pleasure

      feeling joy or pleasure

      Correct Answer:cover,to hide, protect or enclose

      to hide, protect or enclose

      Correct Answer:fair,treating all equally

      treating all equally

      Q3.
      Match the word to its meaning.

      Correct Answer:uncover,to reveal or expose

      to reveal or expose

      Correct Answer:unfair,not treating all things equally

      not treating all things equally

      Correct Answer:unhappy,not feeling joy or pleasure

      not feeling joy or pleasure

      Q4.
      Choose the correct spelling of the word in bold in the following sentence. Shestopt at the kerb.

      stopt
      stoped
      Correct answer: stopped
      stopd

      Q5.
      Choose the correct spelling of the word in bold in the following sentence. It was a sunee day.

      suny
      sunee
      Correct answer: sunny
      suney

      Q6.
      Choose the correct spelling of the word in bold in the following sentence. I like to sit on the sofa siping a yummy drink.

      Correct answer: sipping
      sipign
      siping
      sippin

      6 Questions

      Q1.
      What are the missing words? A prefix is a letter or group of letters added to __________ of a word to change its meaning.

      the middle
      the end
      Correct answer: the start

      Q2.
      Which words contain the prefix un-?

      Correct answer: unfair
      sunny
      Correct answer: unhappy
      fun
      Correct answer: undo

      Q3.
      Match the words with the same root word.

      Correct Answer:unhappy,happy

      happy

      Correct Answer:untie,tie

      tie

      Correct Answer:unkind,kind

      kind

      Q4.
      Choose the correct spelling of the word in bold in the following sentence. The sweet was an unhelfy food.

      unhelthy
      unnhealthy
      Correct answer: unhealthy
      unhealthee

      Q5.
      Correct the spelling of the word in bold in the following sentence. The oven was not working and the chicken was uncookt.

      Correct Answer: uncooked

      Q6.
      Correct the spelling of the word in bold in the following sentence. Please help me to unntye my shoe laces.

      Correct Answer: untie

      To help you plan your 2 English lesson on: Using and spelling the prefix un-, download all teaching resources for free and adapt to suit your pupils' needs...