The purposes of this research were to 1) develop learning inquiry on webquest with concept mapping for develop scientific process 2) compare students scientific process before and after learning the lessons that used the learning inquiry on webquest with concept mapping and 3) compare the learning achievement between before and after learning using the learning inquiry on webquest with concept mapping. The one-group pretest-posttest design was used for this study. The research sample was obtained by simple random sampling. The employed research instruments were 1) grade - 5 lesson plans about materials and materials’ properties; 2) a scientific process test; and 3) a learning achievement test. Statistics used for the data analysis were the percentage, mean and t-test for one dependent group.
The research findings were as follows: 1) The development learning inquiry on webquest with concept mapping had four important processes which were studying the basic data, developing format from the problem, testing the format with the research sample and assessing the efficiency of format. The efficiency format was 85.09/81.50 which was higher than the standard criteria. 2) The scientific process of students after learning inquiry on webquest with concept mapping was higher than before learning at the .01 level of significance. 3) The learning achievement of students after learning inquiry on webquest with concept mapping was higher than before learning at the .01 level of significance.
