Globalisation is a complex concept for learners. At KS4/5, one approach would be to provide the class with a full written definition at the very start of the first lesson. For example: ‘Globalisation is the increasing connections between places and people across the planet, established through trade, politics and cultural exchanges, and helped by technology and transport.’
For a younger KS3 audience, however, we may usefully adopt an alternate approach to teaching and learning. Instead, the definition of globalisation will be the final outcome of the first lesson: something students construct for themselves, albeit with teacher facilitation.