Teacher guides students through complex problems by engaging, investigating, explaining and expanding on the problems.
Different from Project based learning the teacher plays a much bigger role in guiding students to use their hands-on, minds-on skills to come to a solution.
Start with parts of plants and move into function while having the students use their prior knowledge to figure out and understand parts of the plant.
Move into an experiment phase of what plants need to survive, how water and sun will effect the plants. Teacher guides student thoughts and they learn through "hands-on minds-on" learning.