Word parts
Suffix spelling rules
Adding a suffix often changes the base word: hop becomes hopping, hope becomes hoping, happy becomes happier. Three rules cover most of it, doubling the final consonant, dropping the silent e, and changing y to i.
These are spelling rules that pay back in reading too. A reader who knows hopping comes from hop is not confused by the double p.
Patterns and example words
Every word below is from the word list Cody generates from, not a hand-picked sample. The count is how many words in that list carry the pattern.
doubling rule -ed, -ing
647 wordsgetting manned manning putting letting setting beginning running
doubling rule -er, -est
473 wordsbigger biggest suggest matter letter summer fitter fittest
drop -e rule
3,940 wordsliked liking making timed timing taking coming giving
-y to i rule
1,738 wordscompanies tried tries countries studied studies earlier earliest
e rule suffixes
945 wordstimed looking changed longed greater greatest lived homed
y rule suffixes
1,739 wordscompanies tried tries countries studied studies earlier earliest
double rule suffixes
3,118 wordswilled willing getting gotten telling called calling manned
Curricula that teach this
Cody generates material against the scope and sequence you already teach. This skill appears in Cody Curriculum, Custom Pattern Selection, UFLI Inspired.
Make a decodable story for this skill
Cody generates stories, word lists and worksheets constrained to the patterns a student has already been taught, so practice on suffix spelling rules does not smuggle in something they have not met yet.