{"schema_version":"task-form-representation.payload.v1","representation":{"schema_version":"task-form-representation.v1","task_form_ref":"task-form.quantity.extra-object-residue-mark.v1","public_slug":"extra-object-residue-mark","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.visible-residue-difference-to-20.v1","public_title":"Extra-object residue mark","teacher_summary":"Extra-object residue mark asks children to mark every unmatched extra object or tap same-zero bridge.","teacher_purpose_md":"Mark exactly the unmatched extra objects in the larger visible group, including same-zero cases.","child_action_public":"Mark every unmatched extra object or tap same-zero bridge.","answer_affordance_public":"Complete the extra-object residue mark action.","visual_primitive_public_refs":["object_sets","residue_marks","same_bridge","pairing_scaffold"],"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 preserve relation under conservation lures.","Story object role: left group.","Story object role: right group.","Story object role: same bridge.","Story object role: residue marks.","Story object role: pairing line."],"retrieval":{"aliases":["Extra-object residue mark","task-form.quantity.extra-object-residue-mark.v1","visible_residue_object_mark","object_sets","residue_marks","same_bridge","pairing_scaffold"],"teacher_questions":["What does Extra-object residue mark mean?","How does Extra-object residue mark adapt for my child?","Can I see an example of Extra-object residue mark?"],"keywords":["extra-object residue mark","visible_residue_object_mark","count.compare.objects.to-20"],"short_answer_public":"Extra-object residue mark asks children to mark every unmatched extra object or tap same-zero bridge.","canonical_links":[{"label":"Extra-object residue mark","url":"#taskform-extra-object-residue-mark"}],"safe_to_quote_snippets":["Extra-object residue mark asks children to mark every 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Reasoning","pattern_cluster_refs":["pattern-cluster.quantity.visible-set-comparison.v1","pattern-cluster.quantity.representation-transfer.v1"],"task_pattern_refs":["task-pattern.quantity.visible-set-compare-to-20.v1","task-pattern.quantity.visible-residue-difference-to-20.v1","task-pattern.quantity.visible-difference-amount-to-20.v1","task-pattern.quantity.one-to-one-pairing-proof-to-20.v1","task-pattern.quantity.conservation-invariance-compare-to-20.v1","task-pattern.quantity.cross-representation-relation-transfer-to-100.v1","task-pattern.quantity.comparison-proof-card-selection.v1"],"task_form_refs":["task-form.quantity.object-set-compare-choice.v1","task-form.quantity.extra-object-residue-mark.v1","task-form.quantity.difference-amount-relation-choice.v1","task-form.quantity.object-pair-proof-builder.v1","task-form.quantity.conservation-transform-relation-choice.v1","task-form.quantity.cross-representation-relation-match.v1","task-form.quantity.comparison-proof-card-choice.v1"],"teacher_summary":"Comparing 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 visible.","route_variant_refs":["support_repair","core","stretch_transfer","challenge_ready"],"age_band_refs":["age_6_7","age_8_9","age_10_11"],"practice_focus_refs":["practice-focus.balanced.v1","practice-focus.number-sense-place-value.v1"],"standards_refs":["us_ccss:CCSS.K.CC.C.6","uk_england_nc:UK-NC-Y1-number-compare"],"school_program_refs":["us_ccss","uk_england_nc"],"challenge_refs":["challenge.count.compare.objects.to-20"],"story_fit_tags":["episodes where compare visible object sets to 20, identify exact visible difference, prove relation by pairing, and preserve relation under conservation lures.","episodes where preserve the same quantity relation across visible sets, numerals, symbols, number lines, bounds, and proof 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