About this activity
Sixteen prefixed words grouped by meaning, with the meaning stated: un- as not in unhappy and unfair, and as reverse in unlock and unpack; re- as again in redo, rewrite, refill and rebuild; pre- as before in preview, preheat, prepay and preschool; dis- as not in disagree and dislike, and as reverse in disappear and disconnect. Morphology is the highest-yield vocabulary work available, because one prefix unlocks a list of words nobody has to teach individually.
How to use it in a session
Cover the prefix and read the base word first, then add the prefix back and ask what changed. That single routine is the skill and it transfers to any word the student meets later. Draw attention to the two meanings of un- and dis-, which is the part most instruction skips: unhappy is not happy, but unlock is not the opposite of lock in the same way — it undoes it. Ten minutes covers the set with the base-word routine.
What to listen for
Watch for over-application to words that only look prefixed. A student who decides uncle means not cle has the strategy working too eagerly, which is a good problem and a fixable one. Notice whether the student can produce a new word — asking for another re- word is the test of whether the pattern generalised past the sixteen on the board.
Carrying it home
Prefixed words come up constantly in instructions and packaging. Asking what preheat means before turning the oven on takes no time and makes the pattern concrete.
Questions
- What grades is this for?
- Third through fifth, which is when multisyllabic prefixed words start dominating classroom text.
- Do I need an account?
- No, all sixteen cards play free.
- Why does morphology help reading?
- Because it makes long words shorter. A student who can strip a prefix is reading a familiar base word plus a known chunk instead of decoding an unfamiliar string letter by letter.