4. Individual students demonstration. This method can produce very effective demonstrations, especially if the student has peer status. An effective way to have individual student demonstrations is to have upperclassmen, from advanced science classes, demonstrate to the lowerclassmen. A freshman general science class may become enthralled when a physics or chemistry senior comes into the class to give a demonstration. An upperclassman, excited about giving a demon stration, helps to convey that excitement to the students .