In this research project the teacher evaluated the experimental records made by elementary school sixth grade student groups examining the "working of the electromagnet". We permitted learners' free communication in this investigation. We told the students the purpose of the experiment. However, we had the students devise the experimental method, and we had the students explain their experimental record. The length of the students' experiments shortened. Moreover, the students came to prepare the experimental tools efficiently. It could be revealed that this method of instruction enabled th...