Tran Viet Nhi 2017. EXPERIMENTING SOME MEASURES TO DEVELOP THE SKILL OF USING DIAGRAMS FOR PRE-SCHOOLERS AGED 5 TO 6 THROUGH THEIR SCIENCE DISCOVERY ACTIVITY. UED Journal of Social Sciences, Humanities and Education. 7, 4 (Dec. 2017), 65-70. DOI:https://doi.org/10.47393/jshe.v7i4.808.