# C16 · An approved kit note · ordinary Day 18

**Complete source:** C16 model says return flat cards to CARD TRAY after use. Actual kit/tray availability absent.

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<summary>Ordinary educator example — after an own attempt</summary>

**Worked reasoning after own attempt:** If adult approves available tray, inspect whether note names it. Otherwise use drawn tray, labelled model.

**Limit/next check:** No unobserved return, presumed equipment or public adoption.

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