Floss rule worksheets

Double the f, l, s or z after a short vowel

Make a floss rule worksheet. The floss rule is a spelling rule: in a short word with a short vowel, an f, l, s or z at the end is written twice, as in puff, bell, dress and buzz. The word floss itself follows the rule. Your child circles the double letters, writes each word under its ending, or colors the words by ending.

Pick a design

Now: . Hundreds of designs to choose from.

Choose each part yourself

To keep a copy, choose “Save as PDF” as the printer. What you type stays on your device: it is not sent to us and not saved.

Your worksheet:

Watch: how the free worksheet makers workA short lesson. Three steps, and every maker works the same way.

How to make your worksheet

  1. Choose the kind of page.
  2. Choose the endings to work on.
  3. Choose how many pages to print.
  4. Print. Press “New version” for other words.

Where the name comes from

f, l, s: the letters of floss. Many teachers add z, as in buzz. The rule works for short words with one short vowel.

Not every word follows it

Some short words break the rule, such as bus, gas, if and pal. They are left out of these pages, so every word follows the rule.

Good questions

Which endings are there?

ff as in puff, ll as in bell, ss as in dress and zz as in buzz.

When should my child learn this?

After short vowel words like cat and pig are easy to read and spell.

Is there an answer key?

Yes. Turn on “Answer key page”.

Can I print in black and white?

Yes. Choose “Black and white” under “Print in”. The page uses very little ink.

Is it free?

Yes, with no sign-up and no limit.

Make another kind of sheet

The One Sheet

Want the next sheet made for your child?

The packs on this site are free. The One Sheet goes further: one sheet a day, made for your child from what you tell us happened.

  • No planning. Today’s sheet is ready every day.
  • Made for your child. The next sheet is built from what you tell us.
  • A few minutes of your time. Paper, not a screen.

See The One Sheet · $9.99 a month

Or try the 10-day plan: Hear It, Write It, $19 one timeOr do the free 3-minute check first