Home of real teaching & learning
  • Full support for teachers
  • Focus on critical thinking
  • Engaging classroom activities
  • Integrated student eBook
  • Assessed tasks / qBank
  • Practice exam questions

The InThinking Guarantee: Our sites are written by expert practitioners and not by AI

See our AI policy

Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.

Don't miss out, find out!

The origins of water on Earth HL (2025)

Water is the medium in which enzyme reactions happen in all known living organisms. It is essential for life and many life forms use water as a habitat. We can see this in the oceans, lakes and rivers on Earth. The search for life is therefore closely linked with the search for extra terrestrial water. This activity explores the sort of planets that could have liquid water? Students have an opportunity to explore...

Help