Students practise using scientific calculators to solve problems involving brackets, powers and the order of operations.

At the start of the lesson students create all the numbers between 10 to 30 using a 'broken calculator'. More able students use the decimal point in each calculation. In the development phase students learn to brackets and powers to break down calculations. The plenary allows students to explore the random, fraction and power buttons.

**Differentiated Learning Objectives**

- All students should be able to perform basic arithmetic and the order of operations using a calculator.
- Most students should be able use a calculator to evaluate problems involving powers and brackets.
- Some students should be able to use the ANS, square root, power and fraction button on a calculator efficiently.