As shown in Table 1, all of them seemed to have strong and informative impressions about the contents.
Strictly speaking, we should have compared the results without and with the Metaverse part. We could have
carried out the same hands-on activity without the virtual class. However, they enjoyed the virtual class on
Second Life very much obviously. That was the first and foremost strong overall impression after the project.
As well as the questionnaire described below, their cheerful smiles indicated and supported very clearly that
our impression was absolutely true. From the viewpoint of original STEM education policy, it obviously
means the success of the project. We could achieve the goal to assure them that we should not be afraid and
scared about radioactivity emotionally, but to make them realize that radioactivity should have been analyzed
and considered technically and scientifically. And finally, the mixture and blending of the lecture, lead and
guidance in virtual Metaverse and the hands-on experiments in STEM education could be effective, using
Metaverse and the virtual system as one of the components