A lovely booklet that sets the students the mission to prove that photosynthesis exists. They are provided with bits of evidence to read for different ways photosynthesis was proven through time. They are then given comprehension questions and challenge questions for the most able to understand how this proves photosynthesis. Also, they are given instructions for practical of testing for starch in variegated leaves to also prove photosynthesis. Finally, they are asked to make conclusions using the evidence they have found.