The Floss Rule is a simple spelling rule that helps students remember when to use a double consonant at the end of a word. The rule states:
• If a word has one vowel only
• The vowel is short
• Ends with f, l, s, and z
• Then double the last letter

Exceptions:
• When the final s sounds like z don’t double it: as, is, has, was and his.
• Some common words that don’t follow the floss spelling rule include: bus, gas, pal, if, this, us, plus, and chef.
.
Edublox offers cognitive training and live online tutoring to students with dyslexia, dysgraphia, dyscalculia, and other learning disabilities. Our students are in the United States, Canada, Australia, and elsewhere. Book a free consultation to discuss your child’s learning needs.
