Help pupils understand how prefixes change word meanings with this complete teaching pack on the prefix ‘de’.The PowerPoint breaks down the different uses of ‘de’, showing how it can reverse an action (defrost), show something going down (devalue) or mean removal (deice). With guided examples, sentence-based activities and a strong focus on vocabulary development, this lesson builds confidence with word formation. The differentiated task sheet gives children the opportunity to practise and apply their understanding independently.