The research is on the Social Studies Area of Grade Four in elementary schools. We analyse and classify the mistakes the students make in the tests to apply the teaching platform design to help them learn and improve their concepts and understandings. In the essay, we use ASP program and Access Data Base to set up the on-line test system to evaluate the result of the primary school students' remedy learnings. After the on-line tests, they can know the types of their own mistakes. The purposes of the research are: 1. Establish the module of teaching platform. Students can use the tool to practice again and agian with sufficient learning and achieve the goals efficiently. 2. Design the interactive learning on-line testing system. 3. Discuss the differences between the on-line tests and the traditional writing tests after the on-line teaching. The results of the research are as follow: 1. The computer multimedia technology is attractive to students. It's much better than teachers' scholastic teaching when we use teaching webpages on students' remedy learning. For the students, it is obviously efficient to practice again and again. 2. After the remedy teaching, the students' correct answering rate is much improved. 3. For the students, the on-line test system is a new try and new contact. The attitudes of the students' concentrating on answering questions make the results of on-line tests more conviction. 4. The proportion of having correct answers to the true/false questions is easily influenced by the key words' changes and its promotion is lower than expected.
