Abstract:
To 1) compare the science subject learning scores between the students studied in problem-based learning on web with different types of scaffolding 2) study the opinions of students about using problem-based learning and scaffolding on web. The samples were 38 ninth grade students of Putabucha school, Bangkok. The samples were assigned into two experimental groups; 19 students in each group. The first group studied problem-based learning on web with soft scaffolding and the second group studied problem-based earning on web with hard scaffolding. The research instruments were problem-based learning on web, learning achievement test, and student opinion questionnaires. Data were analyzed using the descriptive statistics and the t-test. The major findings were as follows: 1. There was found no statistically significant difference between students who studied using soft scaffolding and hard scaffolding in problem-based learning on web towards science learning achievement at the .05 level. 2. There was found no statistically significant difference between opinions of students who studied with different types of scaffolding in problem-based learning on web at the .05 level, however, only chat room found statistically significant difference at the .05 level. And the opinions of students about the advantages of soft scaffolding provided online learner-instructor interaction were ordered as follows: (1) responding to the students' learning needs, (2) making process of problem-based learning on web easier, and (3) helping students to solve problems easier. While the opinions about the advantages of hard scaffolding were (1) the learning resource and related content pictures made process of problem-based learning on web easier, (2) the related content pictures and learning resource responded to the students' learning needs, and (3) the learning resource and related content pictures helped students to solve problems easier.