BBC
Bbc: Skillswise: Suffix Spelling Rules: Double Letters [Pdf]
Learn when to double the final consonant of a word when adding a suffix, and when the consonant does not get doubled.
University of Ottawa (Canada)
Hyper Grammar: Spelling
Online grammar tutorial teaches the various spelling rules. L.9-10.2c Spelling
Patsy Stevens
Garden of Praise: The 1 1 1 Spelling Rule
Sheet music for a song about when to double the final consonant before adding suffixes.
Reading Rockets
Reading Rockets: Six Syllable Types
Six written syllable-spelling conventions are used in English spelling. The conventions are useful to teach because they help students remember when to double letters in spelling and how to pronounce the vowels in new words. The...