This study aims to measure the knowledge of international school students in grades four until seven about the dynamic changes that occur during puberty. Data were obtained from 32 respondents from 4 international schools in Jakarta and 64 respondents from Yangji Elementry School in South Korea. Respondents' knowledge regarding emotional changes during puberty is high, with an average of 88, with the lowest score of 53 and the highest being 100 out of a total score of 100. One out of four respondents is aware of the emotional changes they experience, and other respondents feel more physical and vocal changes. If adolescents are intervened from now on, it has thepotential to improve thinking/learning skills, positive emotions, and responsible healthy behavior which are prerequisites for superior human resources and realiz