The purpose of this master’s thesis was to determine the effect that physical activities during the regular teaching session have on the motivation for class of the 4 th grade elementary school pupils. Physical activities can integrated in the regular class by using microbreaks, which are an extracurricular form of work. Research was conducted on a sample of forty 4 th grade pupils of Eugen Kumičić Elementary School in Slatina. The sample was divided into two subsamples - experimental group and control group. As a part of the experimental protocol, over a course of three weeks, an everyday physical activity was performed with the experimental group during the class, whereas the control group had a regular teaching session without the additional physical activity. The data was gathered through a questionnaire on pupil motivation for class which was filled out by both groups in the initial and in the final examination, and through an additional questionnaire for the experimental group where we attempted to determine if the pupils were interested in microbreaks. Qualitative data was also gathered on the basis of research journal in which pupils’ observations and reactions on every conducted activity were recorded. Resea rch results do not indicate a statistically significant difference in motivation for class between the experimental and the control group. According to the descriptive parameters, motivation for class was more pronounced with the pupils who were taking mic robreaks. Furthermore, pupil behaviour and concentration improved, and pleasant and encouraging atmosphere was created. The students express great interest in taking daily microbreaks by performing different physical activities, and they prefer music activities.