摘要：AbstractHigh school students at Ramwittaya Rachamunklapisek School in Thailand in previous years had records of low learning achievement in chemistry, especially in the area of chemical reaction rates. They also had low levels of integrated science process skills due to lack of experience in inquiry activities. This study aimed to improve student's achievement records and integrated science process skills through 12hours of science inquiry activities. Sixty-three grade 11 students at the school participated in the study in second semester of 2011. The paired-sample t-test analysis showed that student's post-achievement score (mean 26.13, SD 6.40) were statistically higher than their pre-achievement score (mean 8.75, SD 2.51) at p-value less than 0.001. They also obtained an average of 74.52% in integrated science process skills (good level). It was found that predict-observe-explain activities effectively engaged students in the first step and throughout the inquiry learning process. Science inquiry activities effectively enhanced student's learning achievements and integrated science process skills.
关键词：Science inquiry;chemical reaction rates;science process skills
