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Double Letters: ll, ss, ff, zz

Learn the floss rule for doubling l, s, f and z at the end of short words.

12 min6 questions

What you'll be able to do

  • I can spot double letters at the end of words
  • I can use the floss rule to spell short words
  • I can read words that end in ll, ss, ff or zz

How this works

  1. 1Read the short explanations first — they teach you what you need before each question.
  2. 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
  3. 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

6 questions and 1 quick teaching card, including:

  • 🔘Multiple choiceTap the answer you think is best, then check it.
  • ✏️Fill in the blankType the missing word to complete the sentence.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

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Curriculum: AC9E1LY09, AC9E1LY10