Role
Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked
Complete source
An imagined paper store starts with 704 cards and uses 168 cards once. Find the cards left. This is a different opportunity after teaching, not an equal-difficulty test form or a progress measure.
Full alternative
Complete neutral fictional source: An imagined paper store starts with 704 cards and uses 168 cards once. Find the cards left. This is a different opportunity after teaching, not an equal-difficulty test form or a progress measure. Four exact own prompts, in order: 1. What does each count mean, and what number sentence finds cards left? 2. Find cards left using a strategy you can show. 3. A made-up note says “subtract each smaller digit from each bigger digit, so 704−168=664”. Keep or repair this method with a reason. 4. Check your result and explain what it counts. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.
Rights
Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.
Status
Original SVG and PNG constructed in this source candidate. Preserved brief predates construction; different whole source/art and Root Browser acceptance remain pending.