This study aims to gain an in-depth understanding of the implementation of the emotion co-regulation (time-in) strategy in handling tantrum phases in Group A children at TK Al Hidayah V Sanenrejo Tempurejo Jember. This study employed a qualitative descriptive method. Data were collected through observations, interviews with the principal, Group A teachers, and parents, as well as documentation. The results showed that the implementation of the emotion co-regulation strategy played a positive role in helping children manage their emotions during tantrums. The emotional assistance provided by teachers through a calming presence helped children feel safe and become calmer more easily. The obstacles experienced by teachers were limited time and attention, as teachers had to handle children experiencing tantrums while simultaneously supervising other children. This study concludes that the emotion co-regulation (time-in) strategy is effective in helping manage tantrums while also supporting children’s social-emotional development.
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