Sometimes a technological approach is neither the best nor the easiest way to tackle calculations, says Colin Foster.
In this lesson, students have to create calculations which can be done more quickly or accurately without using a calculator. This helps to encourage them to be more critical and careful about their use of calculators. It also provides some opportunities for students to make use of their skills in simplifying algebraic expressions.
Why teach this?
Calculators are powerful tools, but they need to be used intelligently and critically, checking that the answers that they give make sense.
Key curriculum links
- Consolidate their numerical and mathematical capability from Key Stage 3 and extend their understanding of the number system to include powers, roots and fractional indices
- Simplify and manipulate algebraic expressions
Key question
Are there calculations which can be done more quickly or accurately without a calculator?
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KS4 Maths Lesson Plan – Teach Students How, When and Why Not Using a Calculator can be the Best Option
