Time needed: 5 – 10 min
Why? Its a method to force self-responsible thinking about topics.
When? Special before introducing a topic you can ask students to bring something connected to the new topic to school, so they will be curious and you can already understand what students know about the new topic already.
How? Ask students to bring an item from home connected to a special topic and tell them to prepare reasons why they choose this item, in some cases you can also give them the task to search for background or functional explanations.
Any risks? There is nearly no risk, students love to show things from their private environments and the method connects the theoretic knowledge with very practical life experiences of the students.