In many rural parts of the world, people still cook with wood. They often must collect and carry the wood many miles on their backs. They also cut down trees and shrubs instead of letting them grow tall for shade. There is lots of sunshine in these areas, especially if the climate is dry, so a solar cooker would be very useful! Most solar cookers are ovens that convert sunlight into heat energy that is used for cooking. You will design a simple solar oven and improve the design by adding reflectors and insulation while testing heating power with a temperature sensor.