The main aim of Territory-wide System Assessment (TSA) is to help the school administrators to have a clear understanding their students’ standard in Chinese Language, English Language and Mathematics at the level of primary 3, primary 6 and secondary 3 so that they can evaluate their school effectiveness so as to improve the school curriculum and teachers can adjust their teaching strategy. Moreover, the government can also understand the effectiveness of the school policy and provide supports for schools in need of assistances. Many teachers would expect their students to perform well in TSA. They have used different strategies to help students to tackle TSA. This study finds out how Hong Kong Primary Chinese Language teachers help students to prepare for TSA and explores their comments on it. The study employed a combination of quantitative and qualitative methods, with data being collected through questionnaires and interviews. Questionnaires were sent to 90 experienced teachers. A total of six teachers were interviewed, all were experienced teachers. Finding indicates that many teachers have prepared different strategies for helping students to face TSA. The strategies they used were influenced by the "backwash effect". Most of them asked students to buy the TSA exercises and drill students to do exercises so that they could manage the skills in tests. Even in the internal school examination, teachers designed the examination papers, which were very similar to the questions set in the TSA so that students were accustomed to the format and content of the test. Based on the content of the TSA, most teachers were "teaching to the test", but not only "teaching for test". However, teachers neglected to analyze the TSA individual school reports given by the Government so as to evaluate their curriculum design and improve their teachings. On the basis of the major results, this study also makes suggestion at the conclusion.