Lower Secondary

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Converting Fractions, Decimals, and Percentages

Learn how to convert between fractions, decimals, and percentages with easy steps and examples to master these essential math skills.

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Mastering Fraction Operations

Learn how to add, subtract, multiply, and divide fractions step by step with clear examples, tips for simplifying, and mixed number strategies.

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Ratios, Proportions and Rates

From bubble tea mixtures to MTR speeds — simplify ratios, share amounts by the parts method, master the unitary method, and handle rates, exchange rates, map scales and inverse proportion. Foundation lesson for Pre-IGCSE / Lower Secondary.

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Divisibility Rules: 1 to 13 Guide

Learn the simple tricks to check if a number is divisible by any number from 1 to 13 without a calculator. Master divisibility rules today!

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Intro to Algebra: Expressions, Equations & Inequalities

Learn the building blocks of algebra! This lesson explains expressions, equations, and inequalities with easy-to-follow examples and practice problems.

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Like Terms vs. Unlike Terms: Simplifying Algebra

Learn the difference between like and unlike terms in algebra. Master how to identify, group, and simplify algebraic expressions easily.

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The Minus Sign: 5 Classic Mistakes

Master the tricky minus sign in algebra by learning how to avoid common errors with brackets, substitution, and expanding expressions.

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Factorising Quickly: Speed Up Your Algebra

Learn to factorise algebraic expressions quickly by spotting the Highest Common Factor (HCF). Master simple techniques for numbers and variables.

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Fixing 5 Common Algebra Mistakes

Master algebra by correcting the 5 most common mistakes students make with variables, negatives, and powers. Learn to solve equations correctly.

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Patterns and Sequences: Mastering the Nth Term

Learn to identify arithmetic and geometric sequences, find the term-to-term rule, and master the position-to-term formula (nth term) in this math lesson.

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Mean, Median, Mode, and Range

Learn how to calculate the mean, median, mode, and range with simple examples. Master these essential statistics concepts for analyzing data sets.

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Algebraic Expressions: Expand, Simplify and Substitute

Lesson focus Algebra is a compact way to describe a changing quantity. In this lesson, you will use brackets, match like terms, and replace letters with values accurately. Read the worked examples slowly, then use the practice and quiz to check your understanding. Like terms and brackets Only terms with the same variable part can […]

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Numbers, Factors and Primes

Lesson focus Build precise number language before formal algebra and proof. Read the worked example, then use the practice and quiz to check your understanding. Factors and prime factorisation A factor divides a number exactly. A prime number is greater than 1 and has exactly two positive factors: 1 and itself. Example: $84=2^2[[cdot]]3[[cdot]]7$. Writing general […]

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The Division Algorithm

Lesson focus Write whole-number division as divisor × quotient + remainder, then check that the remainder is valid. Read the worked example, then use the practice and quiz to check your understanding. Start with a familiar division Think about $137[[div]]12$. The answer is 11 remainder 5 because $12[[cdot]]11=132$ and there are 5 left over. Write […]