Abstract:The purpose of the research was to develop scientific problem-solving thinking skills in fifth-grade pupils by using problem-based learning (PBL). The target group was 21 pupils attending a primary school located in Sakon Nakhon province, northeast Thailand. Data were collected twice (first and second cycle) in substance change learning unit in the second semester of 2021 academic year. Three types of research tools were the following: six PBL plans within 12 hours (pupils experienced 3 plans in each cycle and… Show more
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