Success: explain why a correct sample percentage can still support an invalid population claim. Prepare Text B. (AC9E8LY03, AC9E8LY02)
- Hook · 2 min. Read only “That proves 80% of all students cycle.” Ask what information a reader needs.
- Reveal · 4 min. Read the rack location and 16/20 response. Model: 80% is accurate for those 20 reported responses; selection near bicycle racks makes “all” unsupported.
- Guided sort · 5 min. Class marks
reported sample result / population claim / policy recommendation. Ask which leap needs a better source. - Independent margin note · 7 min. Learners write a question to the poster and a bounded replacement sentence. Do not ask classmates how they travel.
- Discuss · 4 min. Partners paraphrase the post fairly before critique. Teacher records who distinguishes “false arithmetic” from “unfair inference”.
- Exit · 3 min. “What does 80% describe here?” Key: 16 of the 20 people by the racks in the fictional post, not all students.