The main idea of the study is to research the Fraction Number related indicators of mathematics in Grade 5 and demonstrate the applicable of students mistaken types based on Bayesian Networks which is a wide used analysis tool. Figuring out which sub-skills can influence the mistaken types. Students take the test through the Learning Educational Program online, which is developed based on the index of Grade 1-9 Curriculum. The system can show the subject comprehension and begin to the Learning Educational Program on the basis of the mistaken type distribution. We have conclusions as below. First part: According to the test result from the Learning Educational Program, it can become an assistant to offer individual remedy instructions. It can save time for teachers to correct the paper by taking the examination with the program. By taking the examination, students can understand their weakness. And teachers can adjust teaching for each student who has different aptitude. One of system advantages is to design the remedy instructions based on the test result, which is unavailable by traditional paper test. Second part: Giving suitable remedy instructions to students by the computer media program, it is obviously more available than traditional paper test. For students, the program can be repeated without peers’ stress or blame from teachers, it can not be executed in the classroom definitely. Generally speaking, it is unavailable to give individual remedy instructions to each student. For teachers, they can fulfill the task that is to offer suitable remedy instructions through internet and the program.
