You will need a photovoltaic system and monitor at your school in order to obtain all of the data required to thoroughly implement this lesson. Your class monitors daily temperature and insolation amounts over a two week span of time. They also refer to a hardiness zone map and a tomato yield table for different varieties of tomatoes. From the combination of information, they determine whether or not it is a suitable time to grow tomatoes. You are so fortunate if your school uses solar panels because this is a terrific lesson in variables that influence tomato growth!