The present study investigated the effects of teaching English through games to Thai students who study in grade six at Tessaban 4 Banlamsai School. Thirty students were selected by purposive sampling as an experimental group. The experiment was conducted during the first semester of the academic year 2009. The research instruments consisted of a test and a questionnaire. Fourteen lesson plans were created and used to teach six different topics determined by the school curriculum and nine types of games were implemented in different lesson plans. The data collection procedures were divided into three parts: a pre-experimental phase, an experimental phase and a post-experimental phase. The findings revealed that students had significantly improved in vocabulary knowledge and ability to communicate. Moreover, they tended to have more positive attitudes towards learning English through games. Regarding these results, it can be recommended that using games in teaching English is beneficial to beginners especially those in primary school. However, to do so, teachers ought to consider thoughtfully when selecting suitable games to be used. This is because it was found in the study that students with different learning styles and English ability performed differently when different types of games were used.