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Logic & Puzzles · Grade 6

Design a Fair Investigation

Learners design investigations that give trustworthy answers. They identify independent, dependent and controlled variables; use a simple ramp simulation to see why only one variable should change at a time; explain why sample size, representative samples and repeated trials matter; and write survey questions that do not lead or load the answer. They finish by writing an investigation plan.

  • 4 lessons
  • About 125 minutes
  • Fair investigation check: 10 questions
  • Ways to answer: choose an answer, type a number, sort into groups, arrange tiles, true or false and write a short answer
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What learners will discover

  • Identify independent, dependent and controlled variables, and explain what makes a test fair.
  • Use a simulation to show why only one variable should change at a time, and read results from its rules.
  • Explain why sample size, representative samples and repeated trials make conclusions more trustworthy.
  • Write fair survey questions and fix leading or loaded ones.

Lessons

  1. Variables and fair tests 4 steps2 practiceabout 28 min
  2. One variable at a time 6 steps3 practiceabout 32 min
  3. Samples and repeated trials 4 steps2 practiceabout 30 min
  4. Fair survey questions 5 steps3 practiceabout 35 min
  5. Fair investigation check 10 questions at the end

Keep exploring

Games to practice with

  • Find OllyOlly is hiding! Spot him with clues about where things are.
  • Logic HotelCheck every guest into the right room using clues like "right above" and "between".
  • SwitchworksFlip switches to light the lamps in the target pattern — in as few presses as you can.

More 6th grade logic

Guide for grown-ups