Index Notation — Interactive Lesson (Ages 11–14)

What does 3⁵ actually mean? This 21-slide interactive lesson teaches index notation as a short way to write repeated multiplication.

Mastering Index Notation in Year 7–9 Maths

Students revise the use of index notation, perform simple arithmetic involving indices and compare numbers in index form. They learn the vocabulary of base number and index, power or exponent, and that 3 × 3 × 3 × 3 × 3 is written 3⁵ and read as “3 to the power of 5”, which equals 243. Questions include missing indices, values such as 2³ and 5⁴, calculations such as 3² + 5², and finding m and n when 64 = 8² = 4^m = 2^n.

What’s Included

• 21-slide interactive lesson on index notation
• Learning objectives on revising, calculating with and comparing index numbers
• The vocabulary of base, index, power and exponent
• Missing-index and evaluate-the-power questions
• Fill-in-the-blank and multiple-choice questions with instant feedback

Key Benefits for Students

• Builds a clear understanding of what an index means
• Practises evaluating powers without a calculator
• Prepares students for the laws of indices
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• Clear vocabulary supports exam questions
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A natural step before the laws of indices

Love this? You’ll love…

• Laws of Indices — Interactive Lesson (Ages 11–14)
• Order Of Operations — Interactive Lesson (Year 7)
• Substitution into Formulae and Expressions — Interactive Lesson (Ages 11–14)

A dependable addition to a KS3 number and algebra topic, giving students a secure understanding of powers before they learn the laws of indices. Fluent index notation supports standard form, roots and algebra.

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FAQ

What year group is this for? KS3 — Years 7–9 (ages 11–14).

Does it cover the laws of indices? No — it focuses on notation, evaluating powers and comparing numbers.

Is it self-marking? Yes, with instant feedback on the questions.