Independent and dependent events
Identify whether events in chance experiments and everyday situations are independent (one does not affect the other) or dependent (the first outcome changes the chances of the next)
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Independent and dependent events means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Tally sheet or simple bar sketch; A short set of category counts. Adult tallies one category and sketches a bar. Child tallies three categories and answers one comparison question. Done: three tallies plus one correct comparison. Stop after the fresh check; keep optional challenge for another day.
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Start practiceIndependent and dependent events practice
Practice key ideas from Independent and dependent events.
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Learning resources
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PhET Interactive Simulations · Practice link — not the full lesson
Plinko Probability
Before you open · source notes
Plinko Probability supports hands-on exploration for Independent and dependent events. Not every lab worksheet.
Free interactive page, no sign-in required for the tested path.
Before you openAsk the learner what they changed in the sim or page and what they observed.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “Plinko Probability.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Explain that getting heads on one coin flip does not change the chance of heads on the next flip
- Explain why taking a red marble out of a bag and not putting it back changes the chance of drawing red next
- Sort five described pairs of events into independent and dependent
“If your child flips a coin and gets heads three times in a row, do they understand the next flip is still 50-50 — but that taking a lolly from a bag without putting it back does change what's left?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Probability
- Age range
- Ages 9–13
Standards