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Search every subject world, from Preschool to Grade 12. The first five courses of every subject path are free.

8 courses

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Logic & Puzzles · Grade 6

Ask a Worthwhile Question

Every good investigation starts with a good question. Learners tell researchable questions from ones that are not, use open and closed questions for different jobs, recognize statistical questions that expect answers to vary, and narrow or broaden a question until it fits the time and evidence they have. Examples come from a school garden club, a city skate park plan and a science-fair idea. They finish by writing a question proposal.

  • 4 lessons
  • About 110 min
  • Quiz: 9 questions
Free starter

Logic & Puzzles · Grade 6

Claims, Evidence and Reasons

Learners take arguments apart and build their own. They sort claims of fact, value and policy; compare kinds of evidence (data, examples, expert testimony and anecdotes) and what each can and cannot show; write the reasoning that links evidence to a claim; and judge whether evidence is relevant and sufficient. The main example is a town deciding whether to add a crosswalk near a school. They finish by writing a claim-evidence-reasoning paragraph.

  • 4 lessons
  • About 115 min
  • Quiz: 9 questions
Free starter

Logic & Puzzles · Grade 6

Logic, Counterexamples and Ambiguity

Learners test reasoning the way logicians do. They work with if-then statements and see why the converse does not automatically follow, use a single counterexample to defeat an “all” claim, sort with the quantifiers all, some and none using Venn-style regions, and spot ambiguity and vagueness that make claims slippery. An optional lesson for older learners introduces necessary and sufficient conditions and the contrapositive.

  • 5 lessons
  • About 120 min
  • Quiz: 9 questions
Free starter

Logic & Puzzles · Grade 6

Sources, Attribution and Responsible Research

Learners become careful, honest researchers. Following a fictional student's project on his town's old train station, they tell primary from secondary sources, judge credibility with five questions (who, why, what evidence, when, can it be confirmed), quote, paraphrase and give credit honestly, and learn the basics of using images and media (public domain, Creative Commons, asking permission) and of saying when an AI tool helped. They finish with an annotated source list entry.

  • 4 lessons
  • About 120 min
  • Quiz: 9 questions
Free starter

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 min
  • Quiz: 10 questions
Free starter

Logic & Puzzles · Grade 6

Analyze Data and Uncertainty

Learners make sense of data honestly. They calculate the mean, median and range and see how an outlier pulls on them, use a marble-sampling simulation to see why random samples vary and why larger samples tend to land closer to the truth, learn why two things rising together does not prove one causes the other, and write conclusions with honest confidence language. An optional lesson for older learners explains why the size of a sample matters more than the size of the population.

  • 5 lessons
  • About 125 min
  • Quiz: 10 questions

Logic & Puzzles · Grade 6

Revise an Argument after Feedback

Learners turn feedback into a stronger argument. Using a fictional student's draft about a longer lunch period and comments from fictional classmates, they give and use feedback that is kind, specific and helpful, tell big-picture (global) revisions from sentence-level (local) ones, make a revision plan and revise a paragraph, and respond fairly to a counterargument. They write a revised paragraph and a counterargument paragraph.

  • 4 lessons
  • About 125 min
  • Quiz: 9 questions

Logic & Puzzles · Grade 6

Present, Defend and Reflect

Learners share research the way good presenters do. Following a fictional student's recycling project, they structure a short talk (claim first, evidence, a visual, a clear ask), design clear visuals with one idea per slide and a chart whose title states the finding, answer questions honestly, including “I don't know yet, and here's how I'd find out,” judge which of a speaker's claims are supported, and reflect on their research process. Speaking is optional and never scored.

  • 4 lessons
  • About 120 min
  • Quiz: 9 questions