The Floss Rule

This list samples the most useful parts of the FLOSS Rule: ll in hill, bell, and doll; ss in miss, kiss, and mess; ff in off, puff, and cuff; and the less common zz in buzz. In these one-syllable words, one short vowel comes before the doubled final spelling. Both final letters represent one consonant sound; the sound is not said twice.

The lesson follows the C/K/CK unit because children already know to check the short vowel and the end of a word before choosing a spelling. They now use that same attention to learn why a complete sound-by-sound attempt such as hil may still need a conventional doubled ending. The pattern is strong and useful, but it does not cover every English word ending in f, l, s, or z.

How to practice this list

Say a word, have your child segment it, and identify the short vowel and final sound. Ask whether the word is one syllable and ends in /f/, /l/, /s/, or /z/. Write the base sound sequence first if helpful, then use a known example to decide whether the final spelling should be doubled. Practice ff, ll, and ss in small groups before mixing them and adding buzz.

Writing hil for hill is a normal early attempt because every sound is represented. Acknowledge that the sounds are complete, compare the word with a known FLOSS example, and let the child add the second letter. If the child doubles endings in words outside the pattern, check the syllable, vowel, and final sound rather than saying that all final consonants double.

When your child can spell these words in mixed order, keep the short vowel and doubled ending intact, explain that the two final letters represent one sound, and repair an occasional single-letter ending by checking the pattern, they are ready for Consonant Digraphs and Final -ck.