SPAD12 is a comprehensive educational service online testing and learning platform, including all the Taiwan text book versions, Nani, Kang Hsuan and Han Lin, and the total of test questions, from 1st grade to 9th grade, are more than 600,000. Students can practice all subjects of text books on line, and review diagnostic analysis reports. We provide exclusive “wrong question collecting” function, with it, children not only do remedial learning more efficiently, but also study ahead of time.