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Language World

Each one is a five-minute mystery. Start with any of them.

A word machine changing a closed padlock into an open padlock

Level 23 · Warm-upPrefixes & Roots · PrefixesThe Locked Word WorkshopTwo letters at the front of a word change its meaning, and Lumi thinks un- means 'again'.Written by AI · checked twiceStart lesson

An explorer using a small lantern to see inside a dim cave

Level 24 · Warm-upContext & Vocabulary · Context cluesThe Whispering Cave WordThe sentence explains what 'dim' means, but Lumi does not read it.Written by AI · checked twiceStart lesson

Picture cards matching a kitten with a cat and a puppy with a dog

Level 25 · Warm-upWord Relationships · Analogies and relationshipsThe Baby-Animal SignalA word puzzle pairs baby animals with grown-ups, and Lumi picks a word about dinner instead.Written by AI · checked twiceStart lesson

A bicycle sitting among a violin, trumpet, and flute

Level 26 · Warm-upWord Relationships · Categories and attributesThe Orchestra IntruderViolin, trumpet, flute, bicycle. One of them rolled into the orchestra by mistake.Written by AI · checked twiceStart lesson

A tired hiker carrying a comically enormous backpack

Level 27 · CoreFigurative Language · Figurative languageThe One-Ton BackpackAn explorer says her backpack weighs a ton, and Lumi calls for a crane.Written by AI · checked twiceStart lesson

A research submarine travelling beneath a boat on the ocean surface

Level 28 · CorePrefixes & Roots · Latin roots and word partsThe Submarine Word CodeThe word submarine has a clue hidden at the start: sub-. Lumi sends the ship upwards.Written by AI · checked twiceStart lesson

Children comparing light rain with a powerful downpour

Level 29 · CoreContext & Vocabulary · Precise word choiceThe Storm Warning WordThe weather station needs the right word for very heavy rain. Lumi picks the shortest one.Written by AI · checked twiceStart lesson