Good farmland is in limited supply. Hydroponics is an additional way of meeting the needs of an expanding population. Show your students a hydroponic farm that produces spinach.
Student activity (learning faster by the use of questions):
Here is an alternate approach to learning. Students always get asked questions and have to come up with answers. How about we turn this process around and have the students ask the questions?
This assignment is simple. Students watch the video and formulate questions. Questions start with: who; what; where; when; why and how. Try to come up with at least one question using each of these to start the question. The questions concern the subject matter of the video.