In mid-January she published The 1:1:1 spelling rule. To be honest, after twenty-four years in the professions I had never heard of it, so curiosity caught the best of me and I read what Joanne had to tell us about this rule:
"With the 1:1:1 rule we usually double the end consonant when we add the following vowel suffixes (-ing,-ed,-er, -est, -en, -ish, -ery, -y)."
So it is a great attention-grabbing formula to remind us of a high-occurrence spelling rule that we use with gerunds, regular past and participles, comparatives and superlatives, and to make some adjectives, nouns and verbs.
In addition to the explanation and a wealth of examples, Joanne gives us a quiz and a test, which includes an audio file and she also provides the answers to all the exercises.