The purpose of this study is to propose a teaching method to make students acquire the ability to "speak through speech activities" using four skills: listening, speaking, reading, and writing. Additionally, this study aims to reveal the effects of lesson practice focusing on making students acquire the skill to understand the nature of English as a subject In order to make students acquire speaking skill, this study carried out language activities by setting situations to learn English with others through pair work or group work activities. Then, this study analyzed students' work sheets, a questionnaire, and classroom observations to see how language activities affected their speaking skills. Findings of this study reveal that students tend to feel effects of language activities on their speaking skills through their worksheets and the questionnaire.