{"schema_version":"task-form-representation.payload.v1","representation":{"schema_version":"task-form-representation.v1","task_form_ref":"task-form.quantity.object-pair-proof-builder.v1","public_slug":"object-pair-proof-builder","owning_skill_refs":["count.compare.objects.to-20"],"primary_family_ref":"module-family.count.quantity-comparison-order.v1","pattern_cluster_ref":"pattern-cluster.quantity.visible-set-comparison.v1","task_pattern_ref":"task-pattern.quantity.one-to-one-pairing-proof-to-20.v1","public_title":"Object-pair proof builder","teacher_summary":"Object-pair proof builder asks children to build one-to-one pairs, then choose relation.","teacher_purpose_md":"Construct or inspect one-to-one pairs before choosing relation.","child_action_public":"Build one-to-one pairs, then choose relation.","answer_affordance_public":"Complete the object-pair proof builder action.","visual_primitive_public_refs":["object_sets","pair_bridges","used_token_state","relation_choice"],"child_surface_preview":{"availability":"not_available","preview_asset_refs":[],"absence_md":""},"public_example_refs":[],"non_example_refs":[],"common_mistake_tags":[],"hint_reveal_public":["Hints should point attention to the visible structure before giving away the solution.","Reveals should show the answer path separately from independent evidence."],"public_evidence_signals":[{"id":"check_only","public_label":"Check only","teacher_note_md":"This observation can check the session without moving the child forward by itself."}],"route_variants":[{"id":"support_repair","public_label":"Support","teacher_note_md":"Use a more guided version when recent work shows confusion or heavy help use."},{"id":"core","public_label":"Core","teacher_note_md":"Use the normal version when the child solves fresh examples steadily."},{"id":"stretch_transfer","public_label":"Transfer","teacher_note_md":"Change representation or context after independent evidence stays strong."}],"age_presentation_differences":[{"id":"age_6_7","public_label":"6-7","teacher_note_md":"Use concrete objects, short prompts, and more visible support."},{"id":"age_8_9","public_label":"8-9","teacher_note_md":"Use the same idea with more independent reading and representation."},{"id":"age_10_11","public_label":"10-11","teacher_note_md":"Keep the presentation older and allow explanation, proof, and transfer when evidence supports it."}],"practice_focus_compatibility":[{"id":"practice-focus.number-sense-place-value.v1","public_label":"Number sense and place value","teacher_note_md":"Schedule place-value or comparison review when the story lane is incompatible."}],"challenge_enrichment_public":[],"story_fit_public":["episodes where compare visible object sets to 20, identify exact visible difference, prove relation by pairing, and 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sets to 20 builds quantity comparison and order reasoning through visual tasks, examples, and next-step routes.","teacher_explanation_md":"Given two visible groups with at most 20 objects each, decide which group has more, fewer, or the same amount using matching, counting, or grouping.","child_surface_summary_md":"Children may meet this skill through task formats such as Object-set compare choice, Extra-object residue mark, Difference amount and relation choice, Object-pair proof builder, Conservation transform relation choice, Cross-representation relation match, Comparison proof-card choice.","common_mistake_tags":["Treats a physically longer spread as the larger group."],"hint_reveal_summary_md":"Hints keep the child oriented to the visible structure; reveals show the path without counting as independent evidence.","adaptation_summary_md":"Fresh independent work can move the child toward Core, Transfer, or Challenge routes; help use or confusion keeps support 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