Ut Phuong, D. et al. 2024. CURRENT STATE OF KNOWLEDGE AND SKILLS OF PRESCHOOL TEACHERS IN TEACHING PROBLEM-SOLVING SKILLS TO 5-6-YEAR-OLD KINDERGARTEN CHILDREN IN STEAM EDUCATIONAL ACTIVITIES. Journal of Science Educational Science. 69, 4A (Oct. 2024), 198–207. DOI:https://doi.org/10.18173/2354-1075.2024-0093.