As XML (eXtensible Markup Language) is becoming a standard widely applied in data representation and data exchange in web service. In this paper, we propose a novel approach to type-ahead keyword search in XML data, call TakeXIR. The IR-style approach basically utilizes the statistics of underlying XML data to address the following challenges in XML IR system: (1) Identify the user search intention, i.e. identify the keywords to express user interests and identify nodes user wants to search for and search via. (2) Resolve keyword ambiguity problems: synonyms and polysemy exist in natural language, and a keyword can appear as the text values or tag value of different XML node and carry different meanings.

It has been long noticed that students are lacking the motivation for those type of teacher-centered learning environment. Student-Centered Learning (SCL) is used in the literature to indicate the shift of emphasis from the teacher to the student as the heart of the learning process. In this work we have discussed the methodology of SCL, presented our experience of applying SCL on computer education. Students play the active role in this process and take responsible for their own learning. Tutors are required to use new method to deliver knowledge, being a guider more than an expert.