The increasing demands to learn a foreign language, especially English, encourages researchers to analyze the dynamics of foreign language learning. The purpose of this research is to determine whether the relationship between motivational orientations, basic psychological needs, and academic performance in English class can be modeled. The research group consists of 603 students, attending various grades in a state high school. As data collection tools, Attitude Motivation Test Battery (AMTB) and Basic Needs Satisfaction in General (BNSG) were administered. Data were analyzed via SPSS 17.0 and AMOS 21.0 software program through Structural Equation Model. Results indicate that academic performance in the English course is merely affected by autonomy and attitude, which are among the components of motivational orientation and basic psychological needs. In addition, competence and interest in foreign languages are the remote determiners of academic performance.