Grade 9

Free lessons for Grade 9: pick a subject for explanations, worked examples, practice questions and flashcards.

Grade 9 Mathematics

4 lessons

Mean, Median, Mode and Range
Learners find and compare the mean, median, mode and range of data sets and choose a suitable average.
Linear Equations
Learners solve linear equations with parentheses, fractions and variables on both sides and set up equations to solve problems.
Linear Functions and Slope
Learners find and interpret the slope and intercept of straight-line graphs, write equations in slope-intercept form and model linear situations.
Scatter Plots and Correlation
Learners draw and interpret scatter plots, describe correlation, draw lines of best fit by eye and make cautious predictions.

2 lessons

How to Write an Argumentative Essay
The learner writes an argumentative essay that develops claims and counterclaims fairly, supports and qualifies them with evidence, links reasoning with transitions and keeps a formal style.
Short Story Analysis
The learner analyses how complex characters develop, how authors structure time to create tension and surprise, how narration works and how theme emerges in short fiction.

1 lesson

Working Scientifically
The learner turns a question into a testable hypothesis, identifies independent, dependent and control variables, measures with suitable instruments and SI units, works safely in a lab, and presents and evaluates data.

6 lessons

Ancient China
The learner explains the Mandate of Heaven, compares the teachings of Confucius, Daoism and Legalism, and explains how the Qin unified China and how the Han empire governed, traded along the Silk Roads and invented…
Ancient Greece
The learner compares Greek city-states, explains Athenian democracy and citizenship, and describes Greek achievements in science, philosophy, theatre and the arts and their influence today.
Maya, Aztec and Inca
The learner describes the Maya, Aztec and Inca states and the diversity of other Indigenous peoples of the Americas, including those of present-day Brazil, and their achievements.
Atlantic Slave Trade and Abolition
The learner explains how the transatlantic slave trade worked, the lives and resistance of enslaved people in the Americas, and how abolition movements ended the trade and slavery.
First Civilizations
The learner explains why the first cities and states arose in Mesopotamia, the Indus valley and early China, and what writing, law, trade and religion meant for them.
Novel Study
The learner tracks character, conflict, setting, symbol and theme across a whole novel, relates it to its context and writes about it.

3 lessons

Health Information and Medicines
The learner judges health information, advertising and products, uses prescription and over-the-counter medicines safely, knows their rights as a patient, and explains how the local health-care system is organised and…
Vaccination and Disease Prevention
The learner applies hygiene, sun safety, vaccination and screening to prevent illness, and knows how to use the local healthcare system.
Making Health Decisions
The learner uses a decision-making model in health situations: names the decision and what influences it, generates options, weighs short- and long-term consequences for wellbeing, chooses and justifies an option,…

6 lessons

Computational Thinking
The learner uses decomposition, pattern recognition, abstraction and algorithm design to plan solutions to problems before coding them.
Files, Email and Online Collaboration
The learner manages files and formats, compresses and shares them, communicates by email with good practice, and collaborates in shared documents with version history.
First Programs in Python
The learner writes, runs and fixes short text programs that use output, input, variables and arithmetic, and moves from blocks to text.
How AI Works
The learner explains how machine-learning systems learn patterns from examples, why training data matters, where bias comes from, and how to use generative AI critically.
Presentations and Images
The learner designs presentations and edits images for a stated audience, and uses images legally with licences and attribution.
Online Security
The learner recognises phishing, malware and weak passwords, uses multi-factor authentication and backups, and explains why updates matter.

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