Author note — to cover

Name the four regions of a two-set Venn diagram, including outside both sets, and place listed items or counts into the correct region. Two sets standard; three-set diagrams appear as a Higher-leaning extension. Both tiers. Symbols for the regions follow on set-notation; probabilities on the sibling probabilities page. (P6)

• Fluency — direct questions on the regions of a venn diagram, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).