Teaching practice in schools is a vital part in teacher education in Hong Kong. This paper aims at reporting a study of a number of student teachers of Economic and Public Affairs (E.P.A.) practised teaching in secondary schools in Hong Kong. Some of the secondary schools use English as medium as instruction but most of them use Chinese as medium. Questionnaires were administered to student teachers to collect information and views about their field experience in those schools. Interviews were also conducted to collect more in-depth information and data. Information regarding the kinds of support from regular teachers in their practising schools, the instructional approaches employed, the types and sources of instructional materials used, the extent of student involvement in classroom activities, and the problems encountered in preparing and conducting lessons etc. were investigated. Results of the study shows that most of the student teachers of E.P.A. under study inclined to receive more support from regular teachers in schools, highly rated their effective uses of instructional materials, rated their E.P.A. lessons as student-centered, attributed teaching and learning difficulties to classroom management problems, and indicated reliance on textbooks as the main source of teaching and learning information was minimal. Suggestions for improvement in organizing teaching practices and enhancement of the effectiveness of field experience in the subject Economic and Public Affairs in schools were also made.