Technology constantly provides tools with an educational potential, such as 360o videos. Despite the growing body of research regarding their impact on learning, primary school students are not a common target group. To fill this gap, the study compared the learning outcomes from the use of 360o videos presented using head-mounted displays (HMDs) with that of 360o videos presented using PC monitors and with printed material, having as a target group 46 students, aged 11 to 12. Virtual tours of archaeological sites was the theme of the learning content. A within-subjects research design was applied. The learning outcomes and students' enjoyment were better in the HMDs condition. However, there were no significant differences in motivation and ease of use. Immersion and subjective usefulness were greater only compared to printed material. None of the above factors had an impact on the learning outcomes. Overall, while it can be supported that 360o videos provide positive learning experiences, further studies will help to better understand their exact impact on learning.