[[alternative]]Using the multimedia CAL program to promote the "Solution" Conception Learing

[[abstract]]In view of the fact that many high school students have trouble in making clear the concept "solution", the researcher collects a lot of related materials trying to develop a computer-assisted learning program, which aims to help students get rid of some misconceptions. The research is based on the official high school science textbooks (the academic year 86-87, volume 1-3). And from them some solution-related contents like "the essence of solution", "the process of dissolving", and "dissolve equilibrium" are extracted. On the basis of those contents, combining "concept change model" and "particle model", exerting animation as well as motion pictures, a computer-assisted learning program, especially designed for the introduction of "solution", comes into being. In order to test the program's effectiveness, the researcher invited 40 high school seniors from Taipei County during winter break as examples, who in turn underwent the pre-test, on-line instruction, and post-test. After they were questioned their opinions about the software, the researcher chose from them ten and had an interview with them individually. As the result shows, students make astonishing progress in the post-test after receiving on-line instruction (t=9.47, p<.01); what is more, most misconceptions are successfully removed. Some seem unlikely to get rid of through a few hour' instruction. In addition, the questionnaires reveal that students respond positively to the program and consider it a great aid in understanding the concept of "solution.". However they suggest more efforts should be made in the increase of question items and in the perfection of animation and motion pictures.