Word parts
Prefixes
A prefix is a word part added to the front that changes meaning: un- makes a word its opposite, re- makes it happen again, pre- puts it before. The base word underneath stays intact, which makes prefixed words easier to decode than their length suggests.
Prefixes carry meaning as well as sound, so they do double duty as decoding and vocabulary instruction.
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.
pre-
456 wordspresent presented presenting presents prepare prepared prepares preparing president presidents prettier pretties prettiest presses pressing pressure pressured pressures pressuring previous prefer prefered preferred preferring
re-
2,481 wordsreport reported reporting reports resulted resulting results return returned returning returns recorded recording recordings records remembered remembering remembers remained remaining remains received receives receiving
un-
990 wordsunderstanding understands unclear unfortunately unable unlike unusual unemployment undertake undertaken undertakes undertaking undertakings undertook unlikely unknown unknowns underlie underlies underlying undergo undergoes undergoing undergone
dis-
611 wordsdiscuss discussed discusses discussing discussion discussions disease diseased diseases discover discovered discovering discovers display displayed displaying displays distance distanced distances distancing district districts discount
bi-
73 wordsbiking biology bias biased biosphere biannual bicentennial bilingual bimonthly binary bisect biweekly bible bicycle bicycles
tri-
181 wordstripping trial trials trigger triggered triggering triggers tricking triangle triangular triathlon triceps trickle tricycle trigraph trilogy trimming triplet triumph
uni-
135 wordsunits universities university union unions unique uniform uniformed uniforms universal universe universes unite united unites uniting unicycle unify unicorn unicorns unity
Curricula that teach this
Cody generates material against the scope and sequence you already teach. This skill appears in Reading Simplified: 1st Grade Pathway, Reading Simplified: 2nd Grade & Up Pathway, 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 prefixes does not smuggle in something they have not met yet.