The aim of this thesis is to study the teaching methods that provide the greatest learning effect for children in grades 6 in the subject of physics. One class was divided into three equal groups, each group was educated in a specific way. The three teaching methods that have been investigated are: film with reflection, laboratory work and traditional lecture- teaching. The research question of the study is: "Which method of three selected, causes the greatest understanding of the properties of air?”. To answer this question, the students performed a knowledge test, prior to and after the teaching sequences. The knowledge tests were compared between the groups and the result was that the film- and reflection group had learned significantly more than the other groups, in remarkably less time. This result differs from other research that shows that students get the most understanding through laboratory work in science. In general it probably requires a flexible teacher who sees each individual student and can adapt their teaching accordingly.