Global CREST challenges are based around Practical Action's work, which uses science and technology to address global issues such as energy, water and food. They give students a real insight into how science and technology can be used to tackle challenges faced by communities in the developing world, and how they can be part of the solution.Check it out and I hope it helps you in the classroom! Let me know if you use any of these lessons! I'd like to see what is done with the challenges!
PSU Global Teach Ag! Fellow
Agricultural Science Educator