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Probability – Fundamentals and Tree Diagrams
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Probability – Fundamentals and Tree Diagrams
$24.99
📄 PDF + Slides
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TeachLessons
📐 Math
Probability – Fundamentals and Tree Diagrams
US Grades 9–12 · UK Years 10–13 (KS4–KS5) · AU Years 9–12
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Grades 9–12
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Adaptable
Differentiated tasks for mixed-ability classes
Answer keys and teacher notes included
PDF plus slides for projection
Buy once, reuse every school year
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📐 Math 🎓 High School · Grades 9–12

Probability – Fundamentals and Tree Diagrams

US Grades 9–12 · UK Years 10–13 (KS4–KS5) · AU Years 9–12
⭐⭐⭐⭐⭐
Trusted by 10,000+ teachers in the US, UK and Australia · 4.9 / 5 · 98% would recommend
$24.99
One-time payment · no subscription · taxes calculated at checkout
⚡ Instant download 🖨️ Print-ready 📊 Slides included ✏️ Editable files 🎯 Differentiated ✅ Answer keys
📦 What you get
Ready-to-teach Math resource as a downloadable PDF
Differentiated student worksheets for mixed-ability classes
Answer keys and teacher guidance so you can mark in minutes
Slide deck for whiteboard, projector or remote teaching
Lesson plan with timings and learning objectives
Sent to your inbox and stored in your account right after checkout
Buy once, use it with all your own classes, every year
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Works in US, UK and Australian classrooms – US Grades 9–12 · UK Years 10–13 (KS4–KS5) · AU Years 9–12
Product description

Probability – Fundamentals and Tree Diagrams

Probability – Fundamentals and Tree Diagrams is a ready-to-use Math teaching resource for Grades 10–12. This series provides a systematic introduction to the fundamentals of probability. Starting from simple random experiments such as dice and coins, the concepts result, event and sample space are clarified and the Laplace probability is developed as the ratio of favourable to possible results.

Guiding question: How do we describe and calculate chance using probabilities and tree diagrams?

What's included

  • 5 differentiated worksheets with required and optional tasks
  • Full answer keys with expected solutions
  • A 7-slide colour presentation
  • A detailed, step-by-step lesson plan
  • Print & digital — editable and ready to use, no prep required

Learning objectives

  • Use the basic concepts random experiment, result, event and sample space confidently.
  • Calculate Laplace probabilities as favourable over possible results and express them as a fraction and a percentage.
  • Use the complementary event with P(not A) = 1 − P(A) to simplify calculations.
  • Represent multi-stage random experiments in a tree diagram and evaluate them with the product and sum rules.
  • Model everyday situations as random experiments, make assumptions explicit and interpret results with justification.

Topics covered (5 worksheets)

  • Basic concepts and Laplace probability
  • Calculating simple probabilities
  • Tree diagrams and path rules
  • Analysing multi-stage experiments
  • Applications from everyday life

How to use it

Teach the full series in sequence or pull single worksheets as stand-alone lessons. Differentiation is built in through required and optional tasks, so you can meet a range of levels in the same class. The included lesson plan and complete answer keys make the resource ready to teach with no additional preparation.

Frequently asked questions

What grade level is Probability for?
It is designed for Grades 10–12 (Math), and the differentiated tasks let you adapt it up or down a level.

What file formats are included?
You receive editable Microsoft Word worksheets and answer keys, an editable PowerPoint presentation, and a Word lesson plan — all print-ready and suitable for digital classrooms.

Is it ready to use without preparation?
Yes. Everything is classroom-ready: print the worksheets or share them digitally, present the slides, and use the answer keys and lesson plan as-is.

Created with support from ChatGPT (OpenAI) and Claude (Anthropic).

STEP 1
Download
Check out and your files land in your inbox and your account within seconds.
STEP 2
Print or project
Print the handouts, open the slides on your board.
STEP 3
Teach
Run the lesson as written and mark it with the answer keys. Reuse it next year.
⭐ Teacher trust
4.9
⭐⭐⭐⭐⭐
Trusted by 10,000+ teachers in the US, UK and Australia
4.9 / 5 · 98% would recommend TeachLessons resources
📋 Resource details
📐
Subject: Math
🎓
Grade level: High School · Grades 9–12
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Equivalents: US Grades 9–12 · UK Years 10–13 (KS4–KS5) · AU Years 9–12
💾
Format: PDF + slides + editable files (instant download)
🖨️
Use: Print, projector, tablet
✅
Standards: Adaptable to US state standards, the UK National Curriculum and the Australian Curriculum
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Differentiation: Multiple levels included
📋
Answer keys: Included
♾️
License: Single teacher, unlimited own classes
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Last reviewed: 2026
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FAQ about this resource

Your download link is emailed to you the moment checkout completes, usually within seconds. The files also stay in your customer account under Orders, so you can download them again any time.
It is written for High School · Grades 9–12. International equivalents: US Grades 9–12 · UK Years 10–13 (KS4–KS5) · AU Years 9–12.
The content is written to be curriculum-neutral, so it slots into US state standards, the UK National Curriculum and the Australian Curriculum. Objectives are stated in plain language so you can map them to your own scheme of work in a couple of minutes.
Yes. You get a single-teacher license covering all of your own classs, this year and every year after. Sharing the files with colleagues, uploading them to a public site or reselling them is not allowed — additional teacher licenses are available on request.
A print-ready PDF in US Letter and A4 friendly layout, plus a slide deck for your board or projector, plus editable files so you can adapt the wording. Everything works on paper, on a projector and on tablets.
Yes — answer keys and teacher guidance come with the resource, so marking takes minutes rather than an evening.
Yes. Tasks come at several levels of challenge with scaffolds for students who need support and extensions for those who finish early.
Card, PayPal, Apple Pay, Google Pay and Shop Pay are all available. Prices are shown in your local currency where supported, and any tax or VAT is calculated at checkout. Purchase orders and school invoices are available on request.
The product images show real pages from the download, so you can judge the layout and depth before buying. Since the files are delivered instantly, digital purchases are not refundable — message us before ordering if anything is unclear and we will send you a sample page.
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Editorial review

Review: Probability – Fundamentals and Tree Diagrams

In short

Probability – Fundamentals and Tree Diagrams is a fully worked-out teaching resource for Math at High School level (Grades 9–12). Its strength is that it is finished: worksheets, answer keys and teacher notes are all there, so a lesson can start without extra prep.

What stands out
Usable straight away — printing is the only prep
Answer keys and teacher notes are included in full
Several levels of challenge for a mixed-ability class
Wording works across US, UK and Australian classrooms
At a glance
Print-ready PDF plus slides
Download link right after checkout, stored in your account
One-time purchase, no subscription, reuse every year
Works in print, on a projector, whiteboard or tablet
Who it suits

Teachers covering a topic at short notice, early-career teachers under planning pressure, and anyone picking up a cover lesson — and any situation where a lesson has to be ready today.

Reviewed by: TeachLessons editorial team · Last reviewed: 2026
An editorial assessment of structure, scope and classroom use. It is not a customer review.