Watch: Place each object into both, left-only, right-only, or neither. The shell keeps the complete question visible, reserves the canonical reply band, and reveals proof on the same task objects.
Misread: Child action: Place each object into both, left-only, right-only, or neither.
Curriculum: Mapped to Sort Venn Two Set.
Sort Venn Two Set practice with visual examples, common slips, and next-step routes.
This skill appears in Venn two-set four-region sort, Carroll two-attribute grid sort, Edge-case classification proof choice.
Carroll two-attribute grid sort asks the player to place cards into a two-attribute yes/no grid.
Balanced growth
Edge-case classification proof choice asks the player to choose whether an edge case belongs and mark the deciding attribute.
Balanced growth
Venn two-set four-region sort asks the player to place each object into both, left-only, right-only, or neither.
Balanced growth
Fresh independent work can move toward Core, Transfer, or Challenge routes; help use or confusion keeps support visible.
Hints keep attention on the visible structure; reveals show the path without counting as independent evidence.
Presentation can reduce reading and interaction load without changing the selected skill. Practice focus can bias compatible work without breaking prerequisites or story fit.
