About Course
Prefixes are little word-starters that change a word’s meaning. Learn the Year 3 and 4 prefixes – dis-, mis-, in- (and il-, im-, ir-), re-, sub-, inter-, super-, anti- and auto- – what they mean and how to spell words that use them.
Tutwoo Kids is an independent learning service. This course is not affiliated with or endorsed by the Department for Education, Ofqual or any exam board, and Tutwoo Kids certificates are not qualifications. Content was checked against the national curriculum for England in October 2026.
Course Content
Course Lessons
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Prefixes that mean “not”
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in-, il-, im- and ir-
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Prefixes with meanings
For grown-ups
Final Assessment
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