Recognize and use prefixes un- and re- with root words

Identify un- and re- prefixes; decode by stripping the prefix to find the root; build new words by adding un-/re- to grade-appropriate roots. Define un- as 'not / opposite' and re- as 'again / back'. Apply in opinion writing.

Mastery threshold

90%

Min instances

Typical minutes

Spaced intervals (days)

1, 3, 7, 14, 30, 60

Prereqs

Tier-2 vocabulary Set 5 — narrative-action and feeling words

Successors

eng.g3.f.voc.prefixes_pre_dis_mis
(not yet loaded)

Common misconceptions

Strips 'un-' from a word that doesn't actually contain that prefix (uncle, under) and tries to read the rest as a root.
Reads 're-' the same way every time (always 'again') even when context says 'back' (return, recall).

Exercise pool (3)

Diff	Stem	Type
2	Strip the prefix and find the root. (1) unhappy. (2) redo. (3) unsafe. (4) rewrite. (5) uncle. (6) ready.	prefix identify strip
2	Build 4 new words by adding un- or re- to these roots: kind, play, do, fair. Define each new word.	prefix build words
3	Use one un- word AND one re- word in one opinion sentence about a class rule.	prefix use in opinion