Challenge IV is a reading year centred on Latin literature rather than a lesson-paced vocabulary list.
Challenge IV has no lesson-paced vocabulary list of its own. Its Latin work is reading-based, so the vocabulary that supports it is the Henle Fourth Year list.
Browse the Henle Year 4 vocabulary lists →
Amplio is paced to the Classical Conversations schedule: pick your Challenge level and it shows the words assigned for the current week, then drills them with spaced repetition until they stick.
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